fix: remove unnecessary escapes in tag tests and update parser

[karel-rehor]

Proposed Changes

Improve tag parsing in the InfluxQLQueryApi by...

• Using correct escaped and unescaped strings in test keys and values and in anticipated results
• Removing anticipated double escape characters in the tag parser

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• mvn test completes successfully
• Commit messages are conventional
• Sign CLA (if not already signed)

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.40%. Comparing base (c39b23b) to head (d916c8e).
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Additional details and impacted files

@@                 Coverage Diff                  @@
##             hotfix/v6.10.1     #864      +/-   ##
====================================================
+ Coverage             87.90%   88.40%   +0.50%     
- Complexity              726      777      +51     
====================================================
  Files                   172      172              
  Lines                  7067     7056      -11     
  Branches                393      390       -3     
====================================================
+ Hits                   6212     6238      +26     
+ Misses                  732      698      -34     
+ Partials                123      120       -3     

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