Add Proxy Setting for: SaveMappingForStatusCodePattern to only save the mapping when the status code matches the pattern

[StefH]

No description provided.

[codecov]

Codecov Report

Merging #357 into master will increase coverage by 0.13%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #357      +/-   ##
==========================================
+ Coverage   80.53%   80.66%   +0.13%     
==========================================
  Files         114      115       +1     
  Lines        4573     4604      +31     
==========================================
+ Hits         3683     3714      +31     
  Misses        890      890

Impacted Files	Coverage Δ
src/WireMock.Net/Server/FluentMockServer.Admin.cs	64.22% <100%> (+0.06%)	⬆️
...rc/WireMock.Net/Settings/ProxyAndRecordSettings.cs	100% <100%> (ø)	⬆️
src/WireMock.Net/Util/HttpStatusRangeParser.cs	100% <100%> (ø)
src/WireMock.Net/Matchers/JSONPathMatcher.cs	93.61% <0%> (+0.13%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7789f94...de645ef. Read the comment docs.