[Enhancement] release metadata memory after rowsets have been compacted in pk table (backport #46067)

[mergify]

Why I'm doing:

After Rowset generated, SR will load metadata about Rowset, Segment and ColumnReader, which will cause lots of memory, and it's good for query performance.
And in DUP/AGG/UNIQ table, SR will release these memory after Rowset has been compacted, but in PK table, it won't.

So now, PK table will only release metadata memory after Rowset has been deleted, even after this Rowset is too old to be queried anymore. It will waste memory here.

What I'm doing:

release metadata memory after rowsets have been compacted in PK table.

What type of PR is this:

• 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.
• 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:

• 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:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 3.3
  • 3.2
  • 3.1
  • 3.0
  • 2.5

---

This is an automatic backport of pull request #46067 done by [Mergify](https://mergify.com). ## Why I'm doing: After `Rowset` generated, SR will load metadata about `Rowset`, `Segment` and `ColumnReader`, which will cause lots of memory, and it's good for query performance. And in DUP/AGG/UNIQ table, SR will release these memory after `Rowset` has been compacted, but in PK table, it won't.

So now, PK table will only release metadata memory after Rowset has been deleted, even after this Rowset is too old to be queried anymore. It will waste memory here.

What I'm doing:

release metadata memory after rowsets have been compacted in PK table.

What type of PR is this:

• 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.
• 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:

• 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

[mergify]

Cherry-pick of 0471705 has failed:

On branch mergify/bp/branch-2.5/pr-46067
Your branch is up to date with 'origin/branch-2.5'.

You are currently cherry-picking commit 0471705863.
  (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)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   be/src/storage/tablet_updates.cpp

no changes added to commit (use "git add" and/or "git commit -a")

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

[mergify]

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