[Sanitizer] Update the built-in to handle per-element attributes.

This adds support for per-element allow/remove attribute to the generated builtins. Previously, we'd just copy the per-element
allow-list to the global allow-list. We now extend the generator
script to faithfully generate the builtins.

Also add a WPT test that specifically tests for defaults with
per-element attributes.

This is CL 4/7, which together implement the Sanitizer API:

1: crrev.com/c/7096258 - Update the built-in baseline.
2: crrev.com/c/7100560 - Update the built-in default.
3: crrev.com/c/7105682 - Update the configuration's data model.
4: crrev.com/c/7132699 - Update the built-in to handle per-element attributes.
5: crrev.com/c/7106779 - Update the core sanitization algorithm.
6: crrev.com/c/7105823 - Update the configuration modifier methods.
7: crrev.com/c/7106101 - Update flag status and remove virtual test suite.

Bug: 40138584
Change-Id: I5d4ec4e156c6df899fabf540fd5b276477fbe858
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7132699
Reviewed-by: Yifan Luo <lyf@chromium.org>
Commit-Queue: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1549708}

Author: otherdaniel

sanitizer-api/sanitizer-basic-filtering.tentative.html

@@ -258,6 +258,23 @@
 | <svg svg>
 |   xlink href="about:blank"
 
+</script>
+<script id="defaults-with-attributes-per-element" type="html5lib-testcases">
+#data
+<div start=1 value=5 lang=en><ol start=1 value=5 lang=en><li start=1 value=5 lang=en>xx
+#config
+"default"
+#document
+| <div>
+|   lang="en"
+|   <ol>
+|     lang="en"
+|     start="1"
+|     <li>
+|       lang="en"
+|       value="5"
+|       "xx"
+
 </script>
 <script>
 for(const group of