Remove default logger name

[lalitb]

Changes

As per the specs - https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/logs/sdk.md#logger-creation

In the case where an invalid name (null or empty string) is specified, a working Logger MUST be returned as a fallback rather than returning null or throwing an exception, its name SHOULD keep the original invalid value, and a message reporting that the specified value is invalid SHOULD be logged.

So changed the implementation to create the instrumentation scope with empty name if provided and log the warning.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.5%. Comparing base (882e1c2) to head (8fb9f49).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2316   +/-   ##
=====================================
  Coverage   79.5%   79.5%           
=====================================
  Files        123     123           
  Lines      21334   21363   +29     
=====================================
+ Hits       16972   17004   +32     
+ Misses      4362    4359    -3     

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[cijothomas]

Thanks!