[BugFix] Pushdown distinct agg across window not support complex expr (backport #36357)

[mergify]

This is an automatic backport of pull request #36357 done by Mergify.
Cherry-pick of 7a0c140 has failed:

On branch mergify/bp/branch-2.5/pr-36357
Your branch is up to date with 'origin/branch-2.5'.

You are currently cherry-picking commit 7a0c140fe0.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	new file:   fe/fe-core/src/test/resources/sql/query_dump/pushdown_distinct_agg_below_window2.json
	new file:   test/sql/test_push_down_distinct_agg_across_window/R/test_push_down_distinct_agg_across_window
	new file:   test/sql/test_push_down_distinct_agg_across_window/T/test_push_down_distinct_agg_across_window

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   fe/fe-core/src/main/java/com/starrocks/sql/optimizer/LogicalPlanPrinter.java
	deleted by us:   fe/fe-core/src/main/java/com/starrocks/sql/optimizer/rule/tree/pdagg/PushDownDistinctAggregateRewriter.java
	both modified:   fe/fe-core/src/test/java/com/starrocks/sql/plan/AggregatePushDownTest.java
	both modified:   fe/fe-core/src/test/java/com/starrocks/sql/plan/ReplayFromDumpTest.java

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[mergify]

@mergify[bot]: Backport conflict, please reslove the conflict and resubmit the pr

[github-actions]

[FE Incremental Coverage Report]

✅ pass : 205 / 221 (92.76%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	com/starrocks/sql/optimizer/rule/tree/pdagg/PushDownDistinctAggregateRewriter.java	194	210	92.38%	[134, 135, 154, 155, 165, 166, 317, 341, 387, 413, 414, 415, 416, 417, 418, 419]
🔵	com/starrocks/sql/optimizer/LogicalPlanPrinter.java	11	11	100.00%	[]

[github-actions]

[BE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)