enhance: Select L2 segments in L0Compaction as well

[bigsheeper]

/kind improvement

[mergify]

@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.17%. Comparing base (1ef975d) to head (a5efcef).
Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #32991      +/-   ##
==========================================
+ Coverage   82.14%   82.17%   +0.03%     
==========================================
  Files        1006     1006              
  Lines      128452   128452              
==========================================
+ Hits       105513   105558      +45     
+ Misses      18948    18907      -41     
+ Partials     3991     3987       -4     

Files	Coverage Δ
internal/datacoord/compaction.go	88.19% <100.00%> (ø)

... and 31 files with indirect coverage changes

[czs007]

/run-cpu-e2e

[mergify]

@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[mergify]

@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[czs007]

/approve
/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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