Expose certificatee dataplaneapi version metric

[ananthb]

Summary:

• replace certificatee endpoint state rollout reporting with certificatee_dataplaneapi_version{version="v2"|"v3"}
• mark 404 from the v3 runtime certificate endpoint as dataplaneapi v2 and successful probes as v3
• update certificatee tests and metric docs

Tests:

• /usr/local/go/bin/go test ./cmd/certificatee
• /usr/local/go/bin/go test ./...

[github-actions]

Code Coverage Report

Total Coverage: total: (statements) 38.3%

Coverage by function

github.com/vinted/certificator/cmd/certificatee/health.go:27:		newCertificateeHealthChecker	100.0%
github.com/vinted/certificator/cmd/certificatee/health.go:38:		certificateeHealthMaxSyncAge	75.0%
github.com/vinted/certificator/cmd/certificatee/health.go:46:		Check				87.5%
github.com/vinted/certificator/cmd/certificatee/health.go:78:		MarkEndpointSyncSuccess		80.0%
github.com/vinted/certificator/cmd/certificatee/health.go:88:		lastSync			100.0%
github.com/vinted/certificator/cmd/certificatee/helpers.go:9:		createHAProxyClients		0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:24:		main				0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:76:		maybeUpdateCertificates		0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:92:		processHAProxyEndpoint		37.0%
github.com/vinted/certificator/cmd/certificatee/main.go:186:		setDataPlaneAPIVersion		100.0%
github.com/vinted/certificator/cmd/certificatee/main.go:196:		shouldUpdateCertificate		0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:215:		shouldUpdateForLiveExpiry	100.0%
github.com/vinted/certificator/cmd/certificatee/main.go:233:		shouldUpdateForSerialMismatch	100.0%
github.com/vinted/certificator/cmd/certificatee/main.go:243:		updateCertificate		0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:265:		buildPEMBundle			0.0%
github.com/vinted/certificator/cmd/certificatee/main.go:291:		endsWith			0.0%
github.com/vinted/certificator/cmd/certificator/main.go:20:		main				0.0%
github.com/vinted/certificator/pkg/acme/acme.go:27:			GetEmail			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:32:			GetRegistration			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:37:			GetPrivateKey			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:42:			NewClient			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:61:			setupClient			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:80:			setupAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:118:			newAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:130:			getAccountKey			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:159:			registerAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:177:			recoverAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:211:			saveAccount			0.0%
github.com/vinted/certificator/pkg/acme/acme.go:221:			saveKey				0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:18:	ObtainCertificate		0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:50:	GetCertificate			0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:68:	NeedsReissuing			0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:96:	arraysEqual			0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:110:	arrayContains			0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:119:	VaultCertLocation		0.0%
github.com/vinted/certificator/pkg/certificate/certificate.go:123:	storeCertificateInVault		0.0%
github.com/vinted/certificator/pkg/certmetrics/metrics.go:79:		StartMetricsServer		0.0%
github.com/vinted/certificator/pkg/certmetrics/metrics.go:104:		newHandler			100.0%
github.com/vinted/certificator/pkg/certmetrics/metrics.go:128:		PushMetrics			0.0%
github.com/vinted/certificator/pkg/config/config.go:73:			LoadConfig			0.0%
github.com/vinted/certificator/pkg/haproxy/client.go:57:		Error				0.0%
github.com/vinted/certificator/pkg/haproxy/client.go:63:		IsHTTPStatus			100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:68:		unexpectedStatusError		100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:77:		NewClient			100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:112:		NewClients			92.3%
github.com/vinted/certificator/pkg/haproxy/client.go:137:		Endpoint			100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:142:		doRequest			88.9%
github.com/vinted/certificator/pkg/haproxy/client.go:160:		parseAPITime			66.7%
github.com/vinted/certificator/pkg/haproxy/client.go:173:		getConfigVersion		66.7%
github.com/vinted/certificator/pkg/haproxy/client.go:238:		ListCertificates		100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:252:		ListCertificateRefs		90.9%
github.com/vinted/certificator/pkg/haproxy/client.go:294:		GetCertificateDetail		68.4%
github.com/vinted/certificator/pkg/haproxy/client.go:336:		UpdateCertificate		80.0%
github.com/vinted/certificator/pkg/haproxy/client.go:368:		CreateCertificate		78.3%
github.com/vinted/certificator/pkg/haproxy/client.go:409:		DeleteCertificate		92.9%
github.com/vinted/certificator/pkg/haproxy/client.go:433:		ExtractDomainFromPath		100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:453:		NormalizeDomainForVault		0.0%
github.com/vinted/certificator/pkg/haproxy/client.go:461:		IsExpiring			100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:473:		NormalizeSerial			100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:506:		Error				100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:510:		Info				0.0%
github.com/vinted/certificator/pkg/haproxy/client.go:514:		Debug				100.0%
github.com/vinted/certificator/pkg/haproxy/client.go:518:		Warn				0.0%
github.com/vinted/certificator/pkg/haproxy/client.go:523:		toLogrusFields			85.7%
github.com/vinted/certificator/pkg/vault/vault.go:18:			NewVaultClient			0.0%
github.com/vinted/certificator/pkg/vault/vault.go:27:			TokenLookupSelf			0.0%
github.com/vinted/certificator/pkg/vault/vault.go:39:			KVWrite				0.0%
github.com/vinted/certificator/pkg/vault/vault.go:53:			KVRead				0.0%
github.com/vinted/certificator/pkg/vault/vault.go:74:			vaultFullPath			0.0%
total:									(statements)			38.3%