[fix](test)delete unstable case qt_agg_distinct_satisfy_dst_key_with_other_func_low_ndv in agg_strategy

[feiniaofeiafei]

What problem does this PR solve?

Issue Number: close #xxx

Related PR: #xxx

Problem Summary:

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[hello-stephen]

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Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
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[morrySnow]

run buildall

[morrySnow]

/review

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.

[github-actions]

Review result: no blocking issues found.

Critical checkpoint conclusions:

• Goal/test: The PR removes the unstable qt_agg_distinct_satisfy_dst_key_with_other_func_low_ndv shape-plan assertion and removes the two matching expected-output blocks for the two stats iterations. The remaining result query with the same SQL still covers correctness, while only the flaky explain-shape check is removed.
• Scope: The modification is small and focused: one qt_ line and its corresponding .out sections.
• Concurrency/lifecycle/config/compatibility/protocol: Not applicable; this is regression-test-only expected-output maintenance.
• Parallel code paths: The high-NDV version and other low-NDV aggregate strategy cases remain unchanged; this deletion targets only the named unstable low-NDV shape case.
• Test coverage: Coverage is reduced only for this specific shape-plan assertion. The suite still validates the query result and adjacent aggregate strategy shape cases.
• Test results: The .out deletion matches the removed qt_ invocation and does not leave an orphan expected block for that case.
• Observability/transactions/data writes/performance: Not applicable to this PR.

User focus points: no additional user-provided review focus was supplied.