[Metrics] New OpenTelemetry Plugin Implementation of Stats Plugin (#3…

…6070)

<!--

If you know who should review your pull request, please assign it to that
person, otherwise the pull request would get assigned randomly.

If your pull request is for a specific language, please add the appropriate
lang label.

-->

Closes #36070

COPYBARA_INTEGRATE_REVIEW=#36070 from yijiem:grpc-metrics 7265372
PiperOrigin-RevId: 618529035

BUILD

@@ -1695,7 +1695,6 @@ grpc_cc_library(
     language = "c++",
     visibility = ["@grpc:alt_grpc_base_legacy"],
     deps = [
-        "config",
         "gpr",
         "legacy_context",
         "tcp_tracer",