Generate gRPC Client target parsing func

In order to add gRPC server attributes for exporter observability, this
information needs to be parsed into a host and port. The added generated
files provides ParseCanonicalTarget for this functionality.

This is added as a generated template as it is expected to be needed for
all OTLP exporters (e.g. open-telemetry#7404, open-telemetry#7353).

Author: MrAlias

exporters/otlp/otlptrace/otlptracegrpc/internal/gen.go

@@ -26,3 +26,6 @@ package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/ot
 
 //go:generate gotmpl --body=../../../../../internal/shared/x/x.go.tmpl "--data={ \"pkg\": \"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc\" }" --out=x/x.go
 //go:generate gotmpl --body=../../../../../internal/shared/x/x_test.go.tmpl "--data={}" --out=x/x_test.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/observ/target.go.tmpl "--data={ \"pkg\": \"observ\", \"pkg_path\": \"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ\" }" --out=observ/target.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/observ/target_test.go.tmpl "--data={ \"pkg\": \"observ\" }" --out=observ/target_test.go

exporters/otlp/otlptrace/otlptracegrpc/internal/observ/doc.go

@@ -0,0 +1,6 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package observ provides experimental observability instrumentation for the
+// otlptracegrpc exporter.
+package observ // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc/internal/observ"