fix(confmap): Include parent package in e2e test coverage

  The e2e test module was not recording coverage for the parent
  `confmap/internal` package that it tests. This caused test coverage
  to appear as 0% even though the tests exercise the code.

  This adds the parent package to COVER_PKGS so coverage of
  `confmap/internal` is properly tracked for e2e tests.

Author: theomagellan

confmap/internal/e2e/Makefile

@@ -1 +1,4 @@
 include ../../../Makefile.Common
+
+# Override COVER_PKGS to include the parent package that this e2e module tests
+COVER_PKGS := go.opentelemetry.io/collector/confmap/internal,$(COVER_PKGS)