[Enhancement] skip create rows mapper file when compaction output rowset is empty

[luohaha]

Why I'm doing:

After we support light pk compaction publish (#43934), we will create a .crm file when compaction finish, but it will still create .crm file even when output rowset is empty, which is unnecessary.

What I'm doing:

skip create rows mapper file when compaction output rowset is empty

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

[github-actions]

[FE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[BE Incremental Coverage Report]

✅ pass : 2 / 2 (100.00%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	be/src/storage/rows_mapper.cpp	2	2	100.00%	[]

[github-actions]

@Mergifyio backport branch-3.3

[github-actions]

@Mergifyio backport branch-3.2

[github-actions]

@Mergifyio backport branch-3.1

[mergify]

backport branch-3.3

✅ Backports have been created

• #45745 [Enhancement] skip create rows mapper file when compaction output rowset is empty (backport #45715) has been created for branch branch-3.3

[mergify]

backport branch-3.2

✅ Backports have been created

• #45746 [Enhancement] skip create rows mapper file when compaction output rowset is empty (backport #45715) has been created for branch branch-3.2

[mergify]

backport branch-3.1

✅ Backports have been created

• #45744 [Enhancement] skip create rows mapper file when compaction output rowset is empty (backport #45715) has been created for branch branch-3.1