[chore] update mdatagen (#32499)

This PR pulls in the latest mdatagen that auto-generates goleak package
tests. There are still some issues to sort out before being able to use
it, but it's mostly there.

I've found a few more modules where goleak can be enabled with no
additional tests so i've done so as part of this PR

Fixes #30483

---------

Signed-off-by: Alex Boten <[email protected]>

Author: codeboten

Makefile

@@ -259,6 +259,7 @@ docker-telemetrygen:
 generate: install-tools
 	cd ./internal/tools && go install go.opentelemetry.io/collector/cmd/mdatagen
 	$(MAKE) for-all CMD="$(GOCMD) generate ./..."
+	$(MAKE) gofmt
 
 .PHONY: githubgen-install
 githubgen-install:

connector/countconnector/package_test.go renamed to connector/countconnector/generated_package_test.go

@@ -11,3 +11,5 @@ status:
     emeritus: [gbbr]
 
 tests:
+  goleak:
+    skip: true