fix: correct typos in documentation and test files

[ioleksiuk]

Fixes

Summary

Fixed various typos and spelling errors found across documentation and test files in the repository.

Changes

• DEVELOPER_GUIDE.md: Fixed locahost → localhost and corrected broken Python link to point to https://www.python.org/
• rabbitmq_setup_best_practice.md: Fixed recieve → receive
• rabbitmq_performance_optimization_best_practice.md: Fixed recieves → receives and removed duplicate word number number → number
• metric_metadata.json: Removed duplicate words the the → the (2 instances)
• test_solutions_constructs_parser.py: Fixed an an → an in test data and test assertions (3 instances)
• test_tools.py: Fixed an an → an in test assertion

User Experience

Before this PR:
Documentation and test files contained spelling errors and duplicate words that could confuse readers and reduce code quality.

After this PR:
All typos are corrected, improving readability and maintaining professional documentation standards.

Checklist

If your change doesn't seem to apply, please leave them unchecked.

• I have reviewed the contributing guidelines
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented

Is this a breaking change? (Y/N)
N

RFC issue number:
N/A

Checklist:

• Migration process documented (no migration needed)
• Implement warnings (if it can live side by side) (n/a)

Acknowledgment

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of the project license.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.72%. Comparing base (918f85d) to head (04aba09).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2240      +/-   ##
==========================================
- Coverage   90.72%   90.72%   -0.01%     
==========================================
  Files         935      935              
  Lines       66072    66072              
  Branches    10602    10602              
==========================================
- Hits        59944    59942       -2     
  Misses       3787     3787              
- Partials     2341     2343       +2     

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[ioleksiuk]

Please let me know if anything needed on my end at the moment :)

[ioleksiuk]

Please review this minor documentation change:
@gcacace @shri-tambe @agiuliano @jimini55 @kenliao94 @hashimsharkh @scottschreckengaust 😊