Pagination: Remove getTotalHits feature

[Yury-Fridlyand]

Description

Paging thru SELECT * FROM calcs (17 rows) with fetch_size = 5 returns:
Before

• Page 1: total hits = 17, result size = 5, cursor
• Page 2: total hits = 17, result size = 5, cursor
• Page 3: total hits = 17, result size = 5, cursor
• Page 4: total hits = 17, result size = 2

After

• Page 1: total hits = 5, result size = 5, cursor
• Page 2: total hits = 5, result size = 5, cursor
• Page 3: total hits = 5, result size = 5, cursor
• Page 4: total hits = 2, result size = 2

Issues Resolved

Fixes #1581

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

Merging #1649 (71d57a2) into feature/pagination/integ (bc5bede) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@                      Coverage Diff                       @@
##             feature/pagination/integ    #1649      +/-   ##
==============================================================
- Coverage                       97.23%   97.22%   -0.01%     
+ Complexity                       4238     4229       -9     
==============================================================
  Files                             385      385              
  Lines                           10626    10612      -14     
  Branches                          726      726              
==============================================================
- Hits                            10332    10318      -14     
  Misses                            287      287              
  Partials                            7        7              

Flag	Coverage Δ
sql-engine	97.22% <100.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
...arch/sql/planner/physical/CursorCloseOperator.java	100.00% <ø> (ø)
...pensearch/sql/planner/physical/FilterOperator.java	100.00% <ø> (ø)
...pensearch/sql/planner/physical/NestedOperator.java	100.00% <ø> (ø)
.../opensearch/sql/planner/physical/PhysicalPlan.java	100.00% <ø> (ø)
...pensearch/sql/planner/physical/ValuesOperator.java	100.00% <ø> (ø)
...search/executor/protector/ResourceMonitorPlan.java	100.00% <ø> (ø)
...ch/sql/opensearch/response/OpenSearchResponse.java	100.00% <ø> (ø)
...l/opensearch/storage/scan/OpenSearchIndexScan.java	100.00% <ø> (ø)
...arch/storage/system/OpenSearchSystemIndexScan.java	100.00% <ø> (ø)
...opensearch/executor/OpenSearchExecutionEngine.java	100.00% <100.00%> (ø)
... and 2 more