feat: adds proper support for goroutines, block, mutex profiling

[petethepig]

Corresponding PR on the client side: grafana/pyroscope-go#15

To enable this in pull mode:

scrape-configs:
  - job-name: testing
    enabled-profiles: [cpu, mem, goroutines, mutex, block]

Caveat is that mutex and block profiling requires an extra step:

runtime.SetMutexProfileFraction(5)
runtime.SetBlockProfileRate(5)

[codecov]

Codecov Report

Merging #1178 (52fa36b) into main (7247cf5) will decrease coverage by 0.05%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##             main    #1178      +/-   ##
==========================================
- Coverage   69.41%   69.37%   -0.04%     
==========================================
  Files          98       98              
  Lines        3210     3212       +2     
  Branches      836      837       +1     
==========================================
  Hits         2228     2228              
- Misses        978      980       +2     
  Partials        4        4              

Impacted Files	Coverage Δ
...raph/src/FlameGraph/FlameGraphComponent/Header.tsx	90.91% <0.00%> (ø)
packages/pyroscope-flamegraph/src/format/format.ts	69.47% <0.00%> (-1.07%)	⬇️
packages/pyroscope-models/src/flamebearer.ts	60.72% <ø> (ø)
packages/pyroscope-models/src/profile.ts	91.67% <100.00%> (ø)

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[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
webapp/public/assets/app.js	467.16 KB (0%)	9.4 s (0%)	2 s (+0.17% 🔺)	11.4 s

[kolesnikovae]

LGTM

[kolesnikovae]

Hopefully, it won't be a big problem: in pull mode we have a correct mapping, while push API allows specifying it in an explicit way