Add support for instrumentation scope attributes (Meter tags)

[cijothomas]

Fixes #4563

Did not touch Prometheus exporters in this PR, better to wait till #5086 is merged.

Changes

Please provide a brief description of the changes here.

Merge requirement checklist

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

[codecov]

Codecov Report

Merging #5089 (3ac1cf5) into main (617ac6c) will decrease coverage by 0.10%.
Report is 2 commits behind head on main.
The diff coverage is 26.31%.

❗ Current head 3ac1cf5 differs from pull request most recent head c9e0eec. Consider uploading reports for the commit c9e0eec to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5089      +/-   ##
==========================================
- Coverage   83.36%   83.27%   -0.10%     
==========================================
  Files         296      296              
  Lines       12339    12355      +16     
==========================================
+ Hits        10287    10289       +2     
- Misses       2052     2066      +14     

Flag	Coverage Δ
unittests	83.27% <26.31%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/OpenTelemetry/Metrics/Metric.cs	96.52% <100.00%> (+0.03%)	⬆️
src/OpenTelemetry/Metrics/MetricStreamIdentity.cs	86.66% <100.00%> (+0.30%)	⬆️
...elemetry.Exporter.Console/ConsoleMetricExporter.cs	0.00% <0.00%> (ø)
...tryProtocol/Implementation/MetricItemExtensions.cs	82.01% <20.00%> (-3.55%)	⬇️

... and 7 files with indirect coverage changes