Revert Dart SDK to c766fffb626e (#40315)

Revert Dart SDK to c766fffb626e

Author: zanderso

DEPS

@@ -48,7 +48,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/main/DEPS
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '5c210933cdfe724c29ed026ed73380ec759eb65f',
+  'dart_revision': 'c766fffb626ecac3be237703d4c68178f308e5f3',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -63,7 +63,7 @@ vars = {
   'dart_perfetto_rev': 'b8da07095979310818f0efde2ef3c69ea70d62c5',
   'dart_protobuf_gn_rev': 'f872f05cb0378eef9a7a2609076929f0f35b4141',
   'dart_protobuf_rev': '75bc380a6e9601565606a13dee16c5ab2bf5019c',
-  'dart_pub_rev': 'd69493e5163553bde53c0889b7479dee02f550bf',
+  'dart_pub_rev': '048e3ad2b5e1b4ebe6883addbc95722be6904a7b',
   'dart_root_certificates_rev': '692f6d6488af68e0121317a9c2c9eb393eb0ee50',
   'dart_watcher_rev': '5968409e1d73e21e75fc22a6481d5efaef7f3558',
   'dart_webdev_rev': 'cfe97534b33d37c7e0bbac2a3576085f74f2eaa3',
@@ -455,7 +455,7 @@ deps = {
    Var('dart_git') + '/test_reflective_loader.git@c4c2d5c3f94a96f3fc79e9e28944fba391bc544c',
 
   'src/third_party/dart/third_party/pkg/tools':
-   Var('dart_git') + '/tools.git@e5353aa3ae4bcaa75cd0ac48a6e47035c57df942',
+   Var('dart_git') + '/tools.git@bed358ea8ca10551c710282be96cf6e95620fb24',
 
   'src/third_party/dart/third_party/pkg/typed_data':
    Var('dart_git') + '/typed_data.git@f858046fb420cf644e7d8cb86b7893f2830d8a6c',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: 32cf1eefbb9071de0f330d77974ea042
+Signature: 2959cbbbe19ce6fbee5f838b9de1f204
 
 ====================================================================================================
 LIBRARY: angle