[model/semconv] Add generated_ prefix to generated files (#5148)

For consistency with other generated names in across the collector repos. This also helps to distinguish files that has to be manually created for each semconv version.

Makefile

@@ -298,8 +298,8 @@ gensemconv:
 	@[ "${SPECPATH}" ] || ( echo ">> env var SPECPATH is not set"; exit 1 )
 	@[ "${SPECTAG}" ] || ( echo ">> env var SPECTAG is not set"; exit 1 )
 	@echo "Generating semantic convention constants from specification version ${SPECTAG} at ${SPECPATH}"
-	semconvgen -o model/semconv/${SPECTAG} -t model/internal/semconv/template.j2 -s ${SPECTAG} -i ${SPECPATH}/semantic_conventions/resource -p conventionType=resource
-	semconvgen -o model/semconv/${SPECTAG} -t model/internal/semconv/template.j2 -s ${SPECTAG} -i ${SPECPATH}/semantic_conventions/trace -p conventionType=trace
+	semconvgen -o model/semconv/${SPECTAG} -t model/internal/semconv/template.j2 -s ${SPECTAG} -i ${SPECPATH}/semantic_conventions/resource -p conventionType=resource -f generated_resource.go
+	semconvgen -o model/semconv/${SPECTAG} -t model/internal/semconv/template.j2 -s ${SPECTAG} -i ${SPECPATH}/semantic_conventions/trace -p conventionType=trace -f generated_trace.go
 
 # Checks that the HEAD of the contrib repo checked out in CONTRIB_PATH compiles
 # against the current version of this repo.

model/semconv/README.md

@@ -16,6 +16,7 @@ semconvgen -o model/semconv/v1.5.0 -t model/internal/semconv/template.j2 -s v1.5
 semconvgen -o model/semconv/v1.5.0 -t model/internal/semconv/template.j2 -s v1.5.0 -i ~/dev/opentelemetry-specification/semantic_conventions/trace -p conventionType=trace
 ```
 
-When generating the constants for a new version ot the specification it is important to note that only `trace.go` and
-`resource.go` are generated automatically.  The `schema.go` and `nonstandard.go` files should be copied from a prior
-version's package and updated as appropriate.  Most important will be to update the `SchemaURL` constant in `schema.go`.
+When generating the constants for a new version ot the specification it is important to note that only
+`generated_trace.go` and `generated_resource.go` are generated automatically. The `schema.go` and `nonstandard.go`
+files should be copied from a prior version's package and updated as appropriate. Most important will be to update
+the `SchemaURL` constant in `schema.go`.

model/semconv/semconv_test.go

@@ -24,7 +24,7 @@ import (
 
 func TestAllSemConvFilesAreCrated(t *testing.T) {
 	// Files that have to be present in each semconv package
-	var expectedFiles = []string{"nonstandard.go", "resource.go", "schema.go", "trace.go"}
+	var expectedFiles = []string{"generated_resource.go", "generated_trace.go", "nonstandard.go", "schema.go"}
 
 	files, err := os.ReadDir(".")
 	assert.NoError(t, err)