stabilization(RC): rc stabilization

[rustatian]

Reason for This PR

Code stabilization before RC

Description of Changes

1. Move the RR worker state to the worker package.
2. Add extra guard to the workers_watcher Get operation to ensure, that the requested worker in the Ready state.
3. Test_Static_Pool_Handle_Dead behaves differently now. Previously it was an error when all workers in the ErrorState and user tried to Exec payload. Now, the worker watcher checks for the worker state before push it to the consumer. And if a worker not in the StateReady state, the worker watcher removes such worker from the stack and allocates a new one.
4. Fast []byte to string conversion (>100x times)
5. Fix issue with disabled endure interface dependencies. Ref: bug(init): Handle disabled interface dependencies endure#85
6. Add container for the workers -> pkg/worker_watcher/container

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[codecov]

Codecov Report

Merging #530 (509abc7) into master (7978c59) will decrease coverage by 1.05%.
The diff coverage is 76.49%.

@@            Coverage Diff             @@
##           master     #530      +/-   ##
==========================================
- Coverage   68.93%   67.88%   -1.06%     
==========================================
  Files          64       65       +1     
  Lines        3206     3263      +57     
==========================================
+ Hits         2210     2215       +5     
- Misses        705      763      +58     
+ Partials      291      285       -6     

Impacted Files	Coverage Δ
internal/protocol.go	50.00% <ø> (ø)
pkg/worker_watcher/container/stack.go	0.00% <0.00%> (ø)
plugins/http/config/http.go	53.22% <0.00%> (ø)
pkg/pool/supervisor_pool.go	67.85% <50.00%> (+2.38%)	⬆️
plugins/kv/memcached/plugin.go	70.87% <50.00%> (+3.50%)	⬆️
pkg/worker/state.go	79.31% <79.31%> (ø)
pkg/worker/sync_worker.go	77.08% <87.50%> (-1.77%)	⬇️
pkg/pool/static_pool.go	80.14% <89.28%> (+0.57%)	⬆️
pkg/worker_watcher/worker_watcher.go	85.45% <89.33%> (+7.53%)	⬆️
pkg/worker/worker.go	90.66% <91.66%> (+2.66%)	⬆️
... and 9 more

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[rustatian]

linked #368