Http input matcher on query parameters (#24627)

Risk Level:  Medium
Testing: Unit test that verifies the documented behavior is correct
Docs Changes: API documentation added
Release Notes: N/A
Platform Specific Features: N/A

Signed-off-by: Adrien Guinet <adrien@reblaze.com>

Mirrored from https://github.com/envoyproxy/envoy @ c7c462fa4c10b7a71edd57ab2029619e752f4b2b

envoy/type/matcher/v3/http_inputs.proto

@@ -60,3 +60,12 @@ message HttpResponseTrailerMatchInput {
   string header_name = 1
       [(validate.rules).string = {well_known_regex: HTTP_HEADER_NAME strict: false}];
 }
+
+// Match input indicates that matching should be done on a specific query parameter.
+// The resulting input string will be the first query parameter for the value
+// 'query_param'.
+// [#extension: envoy.matching.inputs.query_params]
+message HttpRequestQueryParamMatchInput {
+  // The query parameter to match on.
+  string query_param = 1 [(validate.rules).string = {min_len: 1}];
+}