Fix lock for PrometheusCollectionManager

[utpilla]

Similar to the fix made in #4031

Changes

• Use Interlocked.Exchange to set globalLockState to zero instead of a simple assignment

[codecov]

Codecov Report

Merging #4760 (0ec8ba5) into main (b0ab8d5) will increase coverage by 0.04%.
Report is 4 commits behind head on main.
The diff coverage is 61.01%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4760      +/-   ##
==========================================
+ Coverage   82.05%   82.09%   +0.04%     
==========================================
  Files         313      313              
  Lines       12742    12784      +42     
==========================================
+ Hits        10455    10495      +40     
- Misses       2287     2289       +2     

Files Changed	Coverage Δ
src/OpenTelemetry/Metrics/AggregatorStore.cs	81.81% <48.78%> (-3.60%)	⬇️
src/Shared/Options/ConfigurationExtensions.cs	96.00% <71.42%> (-4.00%)	⬇️
...tpListener/Internal/PrometheusCollectionManager.cs	75.82% <100.00%> (ø)
src/OpenTelemetry/Metrics/MeterProviderSdk.cs	91.66% <100.00%> (+0.04%)	⬆️
src/OpenTelemetry/Metrics/Metric.cs	95.78% <100.00%> (+0.04%)	⬆️
src/OpenTelemetry/Metrics/MetricReaderExt.cs	87.17% <100.00%> (+0.45%)	⬆️

... and 7 files with indirect coverage changes