feat: add disktable status

[Leowner]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Add SchedGC, GetRecordPkCnt and GetRecordIdxCnt in disktable

[github-actions]

SDK Test Report

0 tests   0 ✔️  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit 56bdd39.

♻️ This comment has been updated with latest results.

[github-actions]

Linux Test Report

0 tests   0 ✔️  0s ⏱️
0 suites  0 💤
0 files    0 ❌

Results for commit 56bdd39.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Base: 75.60% // Head: 75.86% // Increases project coverage by +0.25% 🎉

Coverage data is based on head (cafba7a) compared to base (26ba54c).
Patch coverage: 98.32% of modified lines in pull request are covered.

❗ Current head cafba7a differs from pull request most recent head 56bdd39. Consider uploading reports for the commit 56bdd39 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1788      +/-   ##
============================================
+ Coverage     75.60%   75.86%   +0.25%     
+ Complexity      392      354      -38     
============================================
  Files           644      619      -25     
  Lines        121346   117998    -3348     
  Branches       1060     1039      -21     
============================================
- Hits          91748    89523    -2225     
+ Misses        29361    28264    -1097     
+ Partials        237      211      -26     

Impacted Files	Coverage Δ
src/storage/disk_table.h	72.56% <91.07%> (-15.52%)	⬇️
src/storage/disk_table.cc	87.47% <97.63%> (+6.03%)	⬆️
src/storage/disk_table_test.cc	99.78% <100.00%> (+<0.01%)	⬆️
src/storage/table_test.cc	99.76% <100.00%> (+0.46%)	⬆️
...java/com/_4paradigm/openmldb/sdk/SqlException.java	0.00% <0.00%> (-100.00%)	⬇️
src/storage/table.cc	70.73% <0.00%> (-16.27%)	⬇️
.../openmldb/batch/nodes/GroupByAggregationPlan.scala	73.80% <0.00%> (-11.91%)	⬇️
...n/java/com/_4paradigm/openmldb/jdbc/SQLDriver.java	50.72% <0.00%> (-11.19%)	⬇️
hybridse/include/sdk/base.h	19.23% <0.00%> (-10.40%)	⬇️
... and 185 more

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[zhanghaohit]

check if there is ut to check: after gc, the data is actually deleted

[tobegit3hub]

@Leowner could you update the code to resolve the conflict?