[BugFix] If the operator is AND, return the predicates that are not null for paimon

[liaowanyou]

Why I'm doing:

For the following predicate: f0 = 44 and (case when f0 = 44 then f1 else f2) = 33, Paimon cannot parse the predicate (case when f0 = 44 then f1 else f2) = 33, and the predicate conversion returns null. Normally, the predicate f0 = 44 should be retained.

What I'm doing:

Fixes #issue

What type of PR is this:

• [x] BugFix
• [ ] Feature
• [ ] Enhancement
• [ ] Refactor
• [ ] UT
• [ ] Doc
• [ ] Tool

Does this PR entail a change in behavior?

• [] Yes, this PR will result in a change in behavior.
• [x] No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• [ ] Interface/UI changes: syntax, type conversion, expression evaluation, display information
• [ ] Parameter changes: default values, similar parameters but with different default values
• [ ] Policy changes: use new policy to replace old one, functionality automatically enabled
• [ ] Feature removed
• [ ] Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• [x] I have added test cases for my bug fix or my new feature
• [ ] This pr needs user documentation (for new or modified features or behaviors)
  • [ ] I have added documentation for my new feature or new function
• [ ] This is a backport pr

Bugfix cherry-pick branch check:

• [x] I have checked the version labels which the pr will be auto-backported to the target branch
  • [x] 4.0
  • [x] 3.5
  • [x] 3.4
  • [x] 3.3

---

[!NOTE] Introduce context-aware predicate conversion that retains valid AND branches and correctly handles NOT; add targeted tests.

• Paimon predicate conversion:
  • Introduce PaimonPredicateContext to carry parent CompoundPredicateOperator.
  • Update PaimonPredicateConverter to accept/use context and propagate it to children.
  • For AND, return the non-null side when the other side is non-convertible.
  • Under parent NOT, return null when a child is non-convertible; continue to ignore NOT LIKE.
• Tests:
  • Add testOrWithFunction covering OR/AND combinations with non-convertible functions and NOT behavior.

^{Written by Cursor Bugbot for commit 008fbcd52d57c51c5f87bede331fd42b19e2dffa. This will update automatically on new commits. Configure here.}

[CLAassistant]

All committers have signed the CLA.

[alvin-celerdata]

@cursor review

[alvin-celerdata]

@cursor review

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file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
:large_blue_circle:	com/starrocks/connector/paimon/PaimonPredicateConverter.java	11	14	78.57%	[70, 119, 209]

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