feat(exporter-prometheus): support withoutScopeInfo option

[cjihrig]

Which problem is this PR solving?

This commit adds support for the without_scope_info option (converted to camelCase to match other options) from the spec.

Fixes # N/A

Related: Here are some output snapshots from the Golang library which include the scope labels.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Existing and new tests.

Checklist:

• Followed the style guidelines of this project
• Unit tests have been added

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.01%. Comparing base (a93b1dc) to head (652e5c9).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5993   +/-   ##
=======================================
  Coverage   95.01%   95.01%           
=======================================
  Files         313      313           
  Lines        8799     8809   +10     
  Branches     1888     1893    +5     
=======================================
+ Hits         8360     8370   +10     
  Misses        439      439           

Files with missing lines	Coverage Δ
...etry-exporter-prometheus/src/PrometheusExporter.ts	96.70% <100.00%> (+0.07%)	⬆️
...ry-exporter-prometheus/src/PrometheusSerializer.ts	96.36% <100.00%> (+0.18%)	⬆️

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