Remove cardinality capping in Metrics

[cijothomas]

#1951 (comment)

To support customizing cardinality cap, we need to use Views, but Views are behind experimental feature flag. Though it is possible to offer a MetricReader level way to configure the limit, it is better to offer the per-metric capability via Views too. Until ability to customize the feature is available, it is better to remove the cardinality capping from the SDK.

(Note that the CardinalityCapping spec is relatively new to OTel and just stabilized few months ago, so this is not a mandatory feature to have for the stable release)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.8%. Comparing base (d2a6b3b) to head (cc261af).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #2528     +/-   ##
=======================================
- Coverage   78.0%   77.8%   -0.3%     
=======================================
  Files        123     123             
  Lines      23056   23059      +3     
=======================================
- Hits       17984   17940     -44     
- Misses      5072    5119     +47     

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