Renamed log_state to log_level for setting the logging level in the Logger

[DhruvSondhi]

This PR aims to rename log_state to log_level for better understanding of the option available in the run_tardis() function.

Description
Renamed the log_state variable to log_level everywhere. log_level makes more sense as through this variable we are setting the log level for the TARDIS Logger. This allows for an intuitive understanding of the option available via the run_tardis() function.

Motivation and context

How has this been tested?

• Testing pipeline.
• Other.

Type of change

• Bug fix.
• New feature.
• Breaking change.
• None of the above. Renaming/Restructuring

Checklist

• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
  • (optional) I have built the documentation on my fork following the instructions.
• I have assigned and requested two reviewers for this pull request.

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[tardis-bot]

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• Is the necessary information provided?
• Is this a duplicate PR?
  • If a new PR is clearly a duplicate, ask how this PR is different from the original PR?
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• Does it pass existing tests and are new tests provided if required?
  • The test coverage should not decrease, and for new features should be close to 100%.
• Is the code tidy?
  • No unnecessary print lines or code comments.

[codecov]

Codecov Report

Merging #1730 (51b941a) into master (d3f13ed) will not change coverage.
The diff coverage is n/a.

❗ Current head 51b941a differs from pull request most recent head 3a58fea. Consider uploading reports for the commit 3a58fea to get more accurate results

@@           Coverage Diff           @@
##           master    #1730   +/-   ##
=======================================
  Coverage   61.87%   61.87%           
=======================================
  Files          63       63           
  Lines        5852     5852           
=======================================
  Hits         3621     3621           
  Misses       2231     2231           

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