Allow setting Ok HTTP client protocols

[OlgaMaciaszek]

Based on #820.

[codecov]

Codecov Report

Merging #825 (84ebabc) into main (c10b06e) will decrease coverage by 0.06%.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #825      +/-   ##
============================================
- Coverage     75.00%   74.94%   -0.06%     
- Complexity      574      575       +1     
============================================
  Files            67       67              
  Lines          2224     2239      +15     
  Branches        300      302       +2     
============================================
+ Hits           1668     1678      +10     
- Misses          390      394       +4     
- Partials        166      167       +1     

Impacted Files	Coverage Δ
...mework/cloud/openfeign/FeignAutoConfiguration.java	84.21% <100.00%> (+0.64%)	⬆️
...d/openfeign/support/FeignHttpClientProperties.java	94.18% <100.00%> (+0.28%)	⬆️
...k/cloud/openfeign/FeignCircuitBreakerTargeter.java	64.86% <0.00%> (-7.55%)	⬇️