limitCountRedis: add option to disable x-envoy-ratelimited

[yizhibian]

Related to #617
use enable_limit_quota_headers as ratelimited option

[spacewander]

Better to use separate option (like Envoy's disable_x_envoy_ratelimited_header) and add test to cover this feature.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.45%. Comparing base (b25067b) to head (8c55999).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #835   +/-   ##
=======================================
  Coverage   85.45%   85.45%           
=======================================
  Files         141      141           
  Lines        8407     8408    +1     
=======================================
+ Hits         7184     7185    +1     
- Misses        968      969    +1     
+ Partials      255      254    -1     

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