chore(ci): prune tests which should run occasionally

[kwannoel]

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What's changed and what's your intention?

Closes #11879.

Save CI costs and make it more stable.

Pruned 8 tests (iceberg sink tests share a common label, java connector node tests share a common label).

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• All checks passed in ./risedev check (or alias, ./risedev c)
• My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)

• My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details)

Documentation

• My PR needs documentation updates. (Please use the Release note section below to summarize the impact on users)

Release note

If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.

[kwannoel]

@wenym1 @xxhZs @ZENOTME @wcy-fdu @BugenZhao @yufansong PTAL, since I think it will affect your tests. I will not merge it if it is too disruptive to your workflows.

After this PR to run these tests, simply add the relevant labels (github will autocomplete it), as seen in this PR:

I have also ported any tests not ran per PR to main-cron.