Enable ignored and disabled tests

[GumpacG]

Description

• Enabled ignored and disabled tests.
• Created [BUG] Failing legacy integration tests #922, [BUG] Test project_source_change_type_env should throw a SemanticCheckException #917, [BUG] Test aggregation_cant_merge_indexScan_with_project fails #912, [BUG] Analyzer should report error for mismatch between select and group by items #910 and attached them to disabled tests for traceability.
• Removed irrelevant tests.

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-commenter]

Codecov Report

Merging #926 (16f6714) into 2.x (c3840b6) will decrease coverage by 3.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x     #926      +/-   ##
============================================
- Coverage     97.90%   94.88%   -3.02%     
- Complexity     3072     3153      +81     
============================================
  Files           293      315      +22     
  Lines          7588     8532     +944     
  Branches        490      631     +141     
============================================
+ Hits           7429     8096     +667     
- Misses          158      382     +224     
- Partials          1       54      +53     

Flag	Coverage Δ
query-workbench	62.76% <ø> (?)
sql-engine	97.57% <ø> (-0.34%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...rch/planner/physical/MLCommonsOperatorActions.java	1.29% <0.00%> (-0.46%)	⬇️
...c/main/java/org/opensearch/sql/expression/DSL.java	100.00% <0.00%> (ø)
...ain/java/org/opensearch/sql/analysis/Analyzer.java	100.00% <0.00%> (ø)
...java/org/opensearch/sql/ppl/parser/AstBuilder.java	100.00% <0.00%> (ø)
...ava/org/opensearch/sql/utils/SystemIndexUtils.java	100.00% <0.00%> (ø)
...rg/opensearch/sql/ppl/config/PPLServiceConfig.java	100.00% <0.00%> (ø)
...rg/opensearch/sql/sql/config/SQLServiceConfig.java	100.00% <0.00%> (ø)
...rg/opensearch/sql/analysis/ExpressionAnalyzer.java	100.00% <0.00%> (ø)
...opensearch/sql/planner/logical/LogicalPlanDSL.java	100.00% <0.00%> (ø)
...pensearch/sql/ppl/parser/AstExpressionBuilder.java	100.00% <0.00%> (ø)
... and 33 more

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[MaxKsyunz]

LGTM. Thank you!

[acarbonetto]

lgtm

[dai-chen]

Thanks for the changes. I left some comments for some re-enabled tests. Basically those cannot work functionally are safe to be enable now. I think the only concern is for others previously disabled due to flaky behavior. Please help double check. Thanks!