feat(Pool): autovacuum fix + refactor

[wolf4ood]

What this PR changes/adds

In this PR:

• Disabled by default test connection on return.
• Added rollback if necessary on connection test
• New Configuration env variables friendly
• Replaced the disabled test CommonsConnectionPoolServiceExtensionTest with a functioning one

Why it does that

cleanup and bug fix for autovacuum

Linked Issue(s)

Closes #3475

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[codecov-commenter]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (7dc9dde) 71.72% compared to head (e08f6c0) 72.07%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3479      +/-   ##
==========================================
+ Coverage   71.72%   72.07%   +0.34%     
==========================================
  Files         841      842       +1     
  Lines       17009    17020      +11     
  Branches      953      953              
==========================================
+ Hits        12200    12267      +67     
+ Misses       4406     4349      -57     
- Partials      403      404       +1     

Files	Coverage Δ
.../sql/pool/commons/CommonsConnectionPoolConfig.java	100.00% <100.00%> (ø)
.../pool/commons/CommonsConnectionPoolConfigKeys.java	100.00% <100.00%> (ø)
...commons/CommonsConnectionPoolServiceExtension.java	90.90% <100.00%> (+90.90%)	⬆️
...se/edc/sql/pool/commons/CommonsConnectionPool.java	80.00% <73.91%> (+2.00%)	⬆️

... and 1 file with indirect coverage changes

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