chore: Implement settings dump schema to update firefox remote servic…, p=#11579

* chore: Implement settings dump schema to update firefox remote services data, b=no-bug, c=configs, scripts

* feat: Also update with timestamps, b=no-bug, c=configs, scripts

* chore: Move JSON with comments to a new module, b=no-bug, c=scripts, tests

---------

Signed-off-by: mr. m <91018726+mr-cheffy@users.noreply.github.com>

scripts/run_tests.py

@@ -7,6 +7,7 @@ import sys
 import json
 from pathlib import Path
 from typing import Any
+from json_with_comments import JSONWithCommentsDecoder
 
 IGNORE_PREFS_FILE_IN = os.path.join(
     'src', 'zen', 'tests', 'ignorePrefs.json'
@@ -16,15 +17,6 @@ IGNORE_PREFS_FILE_OUT = os.path.join(
 )
 
 
-class JSONWithCommentsDecoder(json.JSONDecoder):
-  def __init__(self, **kw):
-    super().__init__(**kw)
-
-  def decode(self, s: str) -> Any:
-    s = '\n'.join(l for l in s.split('\n') if not l.lstrip(' ').startswith('//'))
-    return super().decode(s)
-
-
 def copy_ignore_prefs():
   print("Copying ignorePrefs.json from src/zen/tests to engine/testing/mochitest...")
   # if there are prefs that dont exist on output file, copy them from input file