[deps] Roll prebuilt Dart SDK to 3.6.0-2.0.dev.

Bug: #56125
Change-Id: Ib270d4ad7f7b4570954aa3688edccef0ccbbad85
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/374297
Reviewed-by: Alexander Aprelev <[email protected]>
Commit-Queue: Ryan Macnak <[email protected]>

Author: rmacnak-google

DEPS

@@ -50,7 +50,7 @@ vars = {
   # Checked-in SDK version. The checked-in SDK is a Dart SDK distribution
   # in a cipd package used to run Dart scripts in the build and test
   # infrastructure, which is automatically built on the release commits.
-  "sdk_tag": "version:3.5.0-307.0.dev",
+  "sdk_tag": "git_revision:7e6469bd51d404916395a47b011d907d2c905121",
 
   # co19 is a cipd package automatically generated for each co19 commit.
   # Use tests/co19/update.sh to update this hash.