test(itests): remove HarmonyDB integration test

[rjan90]

Related Issues

Proposed Changes

This commit removes the HarmonyDB integration test from Lotus. The HarmonyDB functionality is now maintained separately in the Curio project.

• Remove itest-harmonydb test file
• Remove YugabyteDB GitHub Action
• Remove HarmonyDB-related configurations from test workflow

Benefits:

• Brings us one step closer to enabling local execution of integration tests, as it removes a dependency on external services (YugabyteDB) for testing.

Checklist

Before you mark the PR ready for review, please make sure that:

• Commits have a clear commit message.
• PR title conforms with contribution conventions
• Update CHANGELOG.md or signal that this change does not need it per contribution conventions
• New features have usage guidelines and / or documentation updates in
  • Lotus Documentation
  • Discussion Tutorials
• Tests exist for new functionality or change in behavior
• CI is green

[LexLuthr]

@snadrus I think we can remove metrics from lotus as well. HarmonyDB is used for only DBIndex here. This would also allow us to update metrics on Curio side without a conflict.

[rjan90]

@snadrus ping on the comments that Lex added

[ribasushi]

@LexLuthr hijacking someone elses PR and pushing your own changes and then ✅ them is... wrong, on multiple layers.

Nevertheless - the changeset itself seems correct (doesn't excuse how it was arrived at ‼️)

[rvagg]

sgtm but @LexLuthr's commit message will either need to be changed or this PR squashed into a single commit