Remove backward compatibility (BWC) tests

[Yury-Fridlyand]

Remove backward compatibility (BWC) tests, because OpenDistro was archived and not available anymore for testing.

Signed-off-by: Yury Fridlyand [email protected]

Description

Issues Resolved

Failing GHA

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

❗ No coverage uploaded for pull request base (integ-remove-bwc@68663d1). Click here to learn what that means.
The diff coverage is n/a.

@@                 Coverage Diff                 @@
##             integ-remove-bwc      #97   +/-   ##
===================================================
  Coverage                    ?   97.74%           
  Complexity                  ?     2858           
===================================================
  Files                       ?      273           
  Lines                       ?     7020           
  Branches                    ?      442           
===================================================
  Hits                        ?     6862           
  Misses                      ?      157           
  Partials                    ?        1           

Flag	Coverage Δ
sql-engine	97.74% <0.00%> (?)

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