OBI profiling

To profile a OBI while it is instrumenting an application do the following:

Run OBI with the OTEL_EBPF_PROFILE_PORT variable set, e.g. 6060.
Download the required profiles:
```
curl -o <profile> http://localhost:6060/debug/pprof/<profile>
```
Where <profile> can be:
- allocs: a sample of all past memory allocations
- block: stack traces that led to blocking on synchronization primitives
- cmdline: the command to run the program to profile
- goroutine: stack traces of all current goroutines
- heap: a sample of memory allocations of live objects
  - provide an optional gc query parameter to run the GC before sampling the heap
- mutex: stack traces of holders of contended mutexes
- profile: CPU profile
  - provide an optional duration query parameter in seconds
- threadcreate: stack traces that led to the creation of new OS threads
- trace: a trace of execution of the current program
  - provide an optional duration query parameter in seconds
Example:
```
curl "http://localhost:6060/debug/pprof/trace?seconds=20" -o trace20s
curl "http://localhost:6060/debug/pprof/profile?duration=20" -o profile20s
curl "http://localhost:6060/debug/pprof/heap?gc" -o heap
curl "http://localhost:6060/debug/pprof/allocs" -o allocs
curl "http://localhost:6060/debug/pprof/goroutine" -o goroutine
```
Use go tool pprof to dig into the profiles (go tool trace for trace profiles)

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