[follow up] update of message Location

[florianl]

With open-telemetry/semantic-conventions#1188 a semantic convention will be introduced for profiles. These new attributes should be used as replacement for message Location.type_index, which will be removed with open-telemetry/opentelemetry-proto#578.

Once a new version of OTel semantic convention is released, that includes open-telemetry/semantic-conventions#1188, package reporter should be updated and

1. Remove Location.TypeIndex - see

   opentelemetry-ebpf-profiler/reporter/otlp_reporter.go

   Lines 556 to 557 in c96e126

   	TypeIndex: getStringMapIndex(stringMap,
   	traceInfo.frameTypes[i].String()),

2. Use these new attributes in message Location

[Rajamanosankari]

I would like to work on this.

[florianl]

Location.TypeIndex will be removed with #167 and replaced with semantic convention attributes.

[florianl]

Closing as resolved with #167