Switch WireMock stubs schema entry to point to WireMock's GitHub repo (SchemaStore#4834)

* Removed (now quite old) WireMock stubs schema from the repository plus associated tests and updated catalog.json entry to point to maintained version in the WireMock OSS GH repo

* Fixed formatting issue

Author: tomakehurst

src/api/json/catalog.json

@@ -7932,9 +7932,16 @@
     },
     {
       "name": "WireMock stub mapping",
-      "description": "WireMock stub mapping JSON. See https://wiremock.org/docs/stubbing/",
-      "fileMatch": ["wiremock-stub-mapping.yml", "wiremock-stub-mapping.yaml"],
-      "url": "https://www.schemastore.org/wiremock-stub-mapping.json"
+      "description": "WireMock single or multiple stub mapping JSON. See https://wiremock.org/docs/stubbing/",
+      "fileMatch": [
+        "wiremock-stub-mapping.yml",
+        "wiremock-stub-mapping.yaml",
+        "stubs.json",
+        "stub-mappings.json",
+        "stubs.yaml",
+        "stub-mappings.yaml"
+      ],
+      "url": "https://raw.githubusercontent.com/wiremock/wiremock/refs/heads/master/schemas/wiremock-stub-mapping-or-mappings.json"
     },
     {
       "name": "Bitmovin Encoding Template",