Auto merge of #19038 - CJ8664:master, r=jdm

Added implementation for itemprop and itemtype along with test files

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- [x] `./mach test-tidy` does not report any errors

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- [x] There are tests for these changes OR

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tests/wpt/mozilla/meta/MANIFEST.json

@@ -33350,6 +33350,36 @@
      {}
     ]
    ],
+   "mozilla/microdata/dup_prop_type_test.html": [
+    [
+     "/_mozilla/mozilla/microdata/dup_prop_type_test.html",
+     {}
+    ]
+   ],
+   "mozilla/microdata/extra_space_test.html": [
+    [
+     "/_mozilla/mozilla/microdata/extra_space_test.html",
+     {}
+    ]
+   ],
+   "mozilla/microdata/none_check.html": [
+    [
+     "/_mozilla/mozilla/microdata/none_check.html",
+     {}
+    ]
+   ],
+   "mozilla/microdata/regular_prop_type_test.html": [
+    [
+     "/_mozilla/mozilla/microdata/regular_prop_type_test.html",
+     {}
+    ]
+   ],
+   "mozilla/microdata/single_prop_type_test.html": [
+    [
+     "/_mozilla/mozilla/microdata/single_prop_type_test.html",
+     {}
+    ]
+   ],
    "mozilla/mime_sniffing_font_context.html": [
     [
      "/_mozilla/mozilla/mime_sniffing_font_context.html",
@@ -66385,6 +66415,26 @@
    "4e0b6d4c416e2e3f26de64e9364f0a8c7a6dc5cb",
    "testharness"
   ],
+  "mozilla/microdata/dup_prop_type_test.html": [
+   "4837cf896419aba6d1df6e89c5849a786d4e4be0",
+   "testharness"
+  ],
+  "mozilla/microdata/extra_space_test.html": [
+   "0a941e2eb10013ab55049d4d6007d8301149f651",
+   "testharness"
+  ],
+  "mozilla/microdata/none_check.html": [
+   "5addb47e08bdb4ad8293f22dffe95e4760336e08",
+   "testharness"
+  ],
+  "mozilla/microdata/regular_prop_type_test.html": [
+   "8e67711c47afe50edaa9b6baaa1349862e639e2e",
+   "testharness"
+  ],
+  "mozilla/microdata/single_prop_type_test.html": [
+   "0d81eecf7e52feb0964e879ffe9450881141caa5",
+   "testharness"
+  ],
   "mozilla/mime_sniffing_font_context.html": [
    "1311e72e0a0dafa6fae594ca1ce2deca164acd36",
    "testharness"