chore: warn about deprecated packages instead of failing the update

[Artur-]

The frontend dependency update script previously exited with an error when deprecated packages were detected, preventing the update PR from being created. Now the script always completes and exports the deprecation details via GITHUB_ENV so the workflow appends them as a warning to the commit message of the generated PR.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Test Results

 1 447 files  ±0   1 447 suites  ±0   1h 25m 8s ⏱️ -46s
10 217 tests ±0  10 149 ✅ ±0  68 💤 ±0  0 ❌ ±0 
10 689 runs  ±0  10 620 ✅ ±0  69 💤 ±0  0 ❌ ±0 

Results for commit b3e6671. ± Comparison against base commit 840472c.

[vaadin-bot]

Hi @Artur- and @caalador, when i performed cherry-pick to this commit to 25.2, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick e671b53
error: could not apply e671b53... chore: warn about deprecated packages instead of failing the update (#24619)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

[vaadin-bot]

Hi @Artur- and @caalador, when i performed cherry-pick to this commit to 25.1, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick e671b53
error: could not apply e671b53... chore: warn about deprecated packages instead of failing the update (#24619)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

[vaadin-bot]

Hi @Artur- and @caalador, when i performed cherry-pick to this commit to 24.10, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick e671b53
error: could not apply e671b53... chore: warn about deprecated packages instead of failing the update (#24619)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

[vaadin-bot]

Hi @Artur- and @caalador, when i performed cherry-pick to this commit to 24.9, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick e671b53
error: could not apply e671b53... chore: warn about deprecated packages instead of failing the update (#24619)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".