Add semconvutil and use it instead of httpconv and netconv (#3817)

* Add semconvutil based on semconv/v1.18.0

* semconv v1.17.0

* otelrestful: Reuse semconvutil

* otelgin: Reuse semconvutil

* Fix imports

* otelmux: Reuse semconvutil

* otelecho: Reuse semconvutil

* otelmacaron: Reuse semconvutil

* otelhttptrace: Reuse semconvutil

* otelhttp: Reuse semconvutil

* Fix build

* Update readme

* Add doc that code is copied

* Fix wording

* Revert Makefile

* Regenerate

* Use gotmpl instead of cp

* Fix netconv.go.tmpl

* Update dependabot.yml

* go mod tidy

* Remove internal/shared from versions.yaml

* Remove doc.go.tmpl

Makefile

@@ -81,7 +81,7 @@ generate: go-generate vanity-import-fix
 .PHONY: go-generate
 go-generate: $(OTEL_GO_MOD_DIRS:%=go-generate/%)
 go-generate/%: DIR=$*
-go-generate/%: | $(STRINGER) $(PORTO)
+go-generate/%: | $(STRINGER) $(GOTMPL)
 	@echo "$(GO) generate $(DIR)/..." \
 		&& cd $(DIR) \
 		&& PATH="$(TOOLS):$${PATH}" $(GO) generate ./...
@@ -148,7 +148,7 @@ lint: go-mod-tidy golangci-lint misspell
 .PHONY: license-check
 license-check:
 	@licRes=$$(for f in $$(find . -type f \( -iname '*.go' -o -iname '*.sh' \) ! -path './vendor/*' ! -path './exporters/otlp/internal/opentelemetry-proto/*') ; do \
-	           awk '/Copyright The OpenTelemetry Authors|generated|GENERATED/ && NR<=3 { found=1; next } END { if (!found) print FILENAME }' $$f; \
+	           awk '/Copyright The OpenTelemetry Authors|generated|GENERATED/ && NR<=4 { found=1; next } END { if (!found) print FILENAME }' $$f; \
 	   done); \
 	   if [ -n "$${licRes}" ]; then \
 	           echo "license header checking failed:"; echo "$${licRes}"; \

instrumentation/github.com/emicklei/go-restful/otelrestful/internal/semconvutil/gen.go

@@ -0,0 +1,21 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package semconvutil // import "go.opentelemetry.io/contrib/instrumentation/github.com/emicklei/go-restful/otelrestful/internal/semconvutil"
+
+// Generate semconvutil package:
+//go:generate gotmpl --body=../../../../../../../internal/shared/semconvutil/httpconv_test.go.tmpl "--data={}" --out=httpconv_test.go
+//go:generate gotmpl --body=../../../../../../../internal/shared/semconvutil/httpconv.go.tmpl "--data={}" --out=httpconv.go
+//go:generate gotmpl --body=../../../../../../../internal/shared/semconvutil/netconv_test.go.tmpl "--data={}" --out=netconv_test.go
+//go:generate gotmpl --body=../../../../../../../internal/shared/semconvutil/netconv.go.tmpl "--data={}" --out=netconv.go