plugin build publishing script

[adkozlov]

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[adkozlov]

@meanmail This is a pretty important update in the deployment scripts.
I added a way to automatically attach the new plugin build to the PR so the QA engineer can download it straight away.

Also, now all the phases are executed just once and in a correct order. Tests failures don't fail the whole pipeline, it can be done later.

[meanmail]

Review Summary

Several issues found — some are blockers, some are suggestions. See inline comments for details.

Blockers:

1. The "Upload plugin to Marketplace" step will never execute (trigger mismatch + missing step id)
2. org.gradle.daemon=false and org.gradle.workers.max=2 in gradle.properties will slow down local development for all contributors

Other issues:
3. Tests with continue-on-error don't block the workflow — broken artifacts get uploaded
4. Timestamp-based version format conflicts with the existing YYYY.N scheme used for Marketplace
5. Missing newline at end of both files
6. Typo: "Coretto" → "Corretto"

[meanmail]

Two blocking issues need to be addressed before merging:

1. Marketplace publish step is dead code — the workflow only triggers on pull_request, but the publish condition requires event_name == 'push' on refs/heads/main. Also steps.run-tests.outcome references a non-existent step id. See inline comments for fix.

2. CI-specific Gradle settings leak into local development — org.gradle.daemon=false and org.gradle.workers.max=2 in gradle.properties affect all developers. These should be passed via CLI args in the workflow instead.

See inline comments for details and suggested fixes.

[adkozlov]

BTW there's a part of the reason why I decided to exclude tests from the results.
They used to fail even before anyway. So for now those failures don't seem informative, unless we make it always green.

[meanmail]

All comments addressed. LGTM!