Credential is not supported if Allowed Origin is '*'

[bugdea1er]

CORS disallows setting allowed origin to '*' when credentials are allowed

This pull request sets allowed origin to client origin when credentials are allowed

More info here: https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors/CORSNotSupportingCredentials

[gittiver]

There is a unit test failing:

(2025-01-08 22:27:35) [DEBUG ] 0x11e81b818 from read(1) with description: "stream ended at an unexpected time"

unittest is a Catch2 v3.7.0 host application.
Run with -? for options

-------------------------------------------------------------------------------
middleware_cors_origin
-------------------------------------------------------------------------------
/Users/runner/work/Crow/Crow/tests/unittest.cpp:1994
...............................................................................

/Users/runner/work/Crow/Crow/tests/unittest.cpp:2016: FAILED:
  CHECK( resp.find("Access-Control-Allow-Origin: test-client") != std::string::npos )
(2025-01-08 22:27:35) [DEBUG   ] 0x11e81b818 from write(2)
with expansion:
(2025-01-08 22:27:35) [DEBUG   ] Connection (0x11e81b818) freed, total: 1
  18446744073709551615 (0xffffffffffffffff)
  !=
  18446744073709551615 (0xffffffffffffffff)