Remove the deprecated otel/metric/global pkg

[MrAlias]

Resolve #3819

[codecov]

Codecov Report

Attention: Patch coverage is 63.88889% with 13 lines in your changes missing coverage. Please review.

Project coverage is 81.7%. Comparing base (3015c86) to head (af4515a).
Report is 1709 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/global/instruments.go	0.0%	12 Missing ⚠️
internal/global/meter.go	0.0%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #3829   +/-   ##
=====================================
  Coverage   81.7%   81.7%           
=====================================
  Files        170     168    -2     
  Lines      12474   12462   -12     
=====================================
- Hits       10192   10184    -8     
+ Misses      2067    2063    -4     
  Partials     215     215           

Files with missing lines	Coverage Δ
internal/global/state.go	100.0% <100.0%> (ø)
metric.go	66.6% <ø> (ø)
internal/global/meter.go	93.8% <0.0%> (ø)
internal/global/instruments.go	60.8% <0.0%> (ø)

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