otelgrpc: Add Filter for stats handler

[ymtdzzz]

Description

Add filter for stats handler and move interceptor filter to go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/filters/interceptor considering that it'll be deprecated.

Related Issue

Fixes #4575

Test

Unit tests added.
And I've tested on: https://github.com/grpc/grpc-go/tree/master/examples/route_guide

No filters

Method name filter

	opts = append(opts, grpc.StatsHandler(otelgrpc.NewServerHandler(
		otelgrpc.WithFilter(filters.MethodName("ListFeatures")),
	)))

[dashpole]

lgtm overall.

[codecov]

Codecov Report

Attention: Patch coverage is 88.42105% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 62.7%. Comparing base (d6e2fc4) to head (95bca4e).

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #5196     +/-   ##
=======================================
+ Coverage   62.5%   62.7%   +0.1%     
=======================================
  Files        191     192      +1     
  Lines      11727   11786     +59     
=======================================
+ Hits        7340    7399     +59     
  Misses      4170    4170             
  Partials     217     217             

Files	Coverage Δ
...google.golang.org/grpc/otelgrpc/filters/filters.go	100.0% <100.0%> (+6.0%)	⬆️
...n/google.golang.org/grpc/otelgrpc/stats_handler.go	100.0% <100.0%> (ø)
...entation/google.golang.org/grpc/otelgrpc/config.go	89.0% <50.0%> (+0.6%)	⬆️
...g.org/grpc/otelgrpc/filters/interceptor/filters.go	93.9% <93.9%> (ø)
...ion/google.golang.org/grpc/otelgrpc/interceptor.go	89.4% <0.0%> (ø)

[jmjesperson]

Any update if this will be reviewed in order to be merged?

[ymtdzzz]

@dashpole @hanyuancheung
Please let me know if there is any additional work required for this PR to be merged :)

[pellared]

Overall LGTM, just little comments that I think it would be nice to address before merging.

LGTM, but there are some comments that should be addressed.

[pellared]

@dashpole, can you please make another review and possibly merge if you find everything good?

[pgporada]

Hey thanks!