Auto merge of #25869 - iulianR:issue-23057-tinifiledialogs, r=jdm

Move tinyfiledialog call from script to embedder

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PR is based on work started in #23651. I rebased on top of master and addressed review comments. Handling the `PromptPermission` message in `libsimpleservo` is probably not ideal. Looking forward to make more changes, just let me know how I should proceed.

---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #23057 (GitHub issue number if applicable)

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because ___

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tests/wpt/metadata/permissions/idlharness.any.js.ini

@@ -1,5 +1,9 @@
 [idlharness.any.worker.html]
-  expected: CRASH
+  [Permissions interface: operation query(object)]
+    expected: FAIL
+
+  [Permissions interface: calling query(object) on navigator.permissions with too few arguments must throw TypeError]
+    expected: FAIL
 
 [idlharness.any.html]
   [Permissions interface: operation query(object)]