Handle TRACE-level logging

[asnare]

This PR updates the logging set up during handoff from the Databricks CLI so that TRACE-level logging doesn't trigger a crash. Because Python doesn't support TRACE as a logging level we map this to DEBUG.

In addition, rather than crash when an unknown log-level is encountered we now log a warning and proceed with INFO instead.

Resolves #317.

This has been tested manually with lakebridge.

[codecov]

Codecov Report

❌ Patch coverage is 60.00000% with 6 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@ac509c1). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/databricks/labs/blueprint/cli.py	60.00%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #318   +/-   ##
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  Coverage        ?   80.05%           
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  Files           ?       17           
  Lines           ?     2396           
  Branches        ?      516           
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  Hits            ?     1918           
  Misses          ?      354           
  Partials        ?      124           

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[github-actions]

✅ 40/40 passed, 2 skipped, 1m44s total

_{Running from acceptance #369}