Release v1.16.0-rc.1/v0.39.0-rc.1

[MrAlias]

This is a release candidate for the v1.16.0/v0.39.0 release.
That release is expected to include the v1 release of the OpenTelemetry Go metric API and will provide stability guarantees of that API.
See our versioning policy for more information about these stability guarantees.

Added

• Support global MeterProvider in go.opentelemetry.io/otel. (Revert "Move global metric back to otel/metric/global for minor release (#3986)" #4039)
  • Use Meter for a metric.Meter from the global metric.MeterProvider.
  • Use GetMeterProivder for a global metric.MeterProvider.
  • Use SetMeterProivder to set the global metric.MeterProvider.

Changed

• Move the go.opentelemetry.io/otel/metric module to the stable-v1 module set.
  This stages the metric API to be released as a stable module. (Revert "Move the metric API back to experimental-metrics (#3987)" #4038)

Removed

• The go.opentelemetry.io/otel/metric/global package is removed.
  Use go.opentelemetry.io/otel instead. (Revert "Move global metric back to otel/metric/global for minor release (#3986)" #4039)

[codecov]

Codecov Report

Merging #4048 (b60afdc) into main (17903bc) will increase coverage by 0.0%.
The diff coverage is 100.0%.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #4048   +/-   ##
=====================================
  Coverage   82.2%   82.2%           
=====================================
  Files        175     175           
  Lines      13058   13058           
=====================================
+ Hits       10740   10742    +2     
+ Misses      2097    2095    -2     
  Partials     221     221           

Impacted Files	Coverage Δ
exporters/otlp/otlpmetric/version.go	100.0% <100.0%> (ø)
exporters/otlp/otlptrace/version.go	100.0% <100.0%> (ø)
sdk/version.go	100.0% <100.0%> (ø)
version.go	100.0% <100.0%> (ø)

... and 1 file with indirect coverage changes