reporter: use semantic convention to report frame type

With open-telemetry/semantic-conventions#1188 a
semantic convention for frame types was defined and
open-telemetry/opentelemetry-proto#578 removed
Location.type_index from the OTel profiling signal in favor of the semantic
convention.
Update the reporter to use this semantic convention.

Signed-off-by: Florian Lehner <florian.lehner@elastic.co>

libpf/interpretertype.go

@@ -55,13 +55,13 @@ var interpreterTypeToString = map[InterpreterType]string{
 	UnknownInterp: "unknown",
 	PHP:           "php",
 	PHPJIT:        "phpjit",
-	Python:        "python",
+	Python:        "cpython",
 	Native:        "native",
 	Kernel:        "kernel",
 	HotSpot:       "jvm",
 	Ruby:          "ruby",
 	Perl:          "perl",
-	V8:            "v8",
+	V8:            "v8js",
 	Dotnet:        "dotnet",
 	APMInt:        "apm-integration",
 }

reporter/otlp_reporter.go

@@ -547,13 +547,16 @@ func (r *OTLPReporter) getProfile() (profile *profiles.Profile, startTS, endTS u
 
 		// Walk every frame of the trace.
 		for i := range traceInfo.frameTypes {
+			frameAttributes := addProfileAttributes(profile, []attrKeyValue{
+				{key: "profile.frame.type", value: traceInfo.frameTypes[i].String()},
+			},
+				attributeMap)
+
 			loc := &profiles.Location{
 				// Id - Optional element we do not use.
-				TypeIndex: getStringMapIndex(stringMap,
-					traceInfo.frameTypes[i].String()),
 				Address: uint64(traceInfo.linenos[i]),
 				// IsFolded - Optional element we do not use.
-				// Attributes - Optional element we do not use.
+				Attributes: frameAttributes,
 			}
 
 			switch frameKind := traceInfo.frameTypes[i]; frameKind {