migrate mobiletc-prebuild to crostc-worker

As mentioned in b/445451590, the mobiletc-prebuild account should no
longer be in use; the new account its CLs are uploaded under is
crostc-worker.

Migrate here, since the rationale for MergeApprovedYolo exemptions still
applies.

Clone of http://crrev.com/i/8602883

Bug: 445451590
Change-Id: I737ada14056b5446c08be4da999c11f332edb83f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/+/6969092
Reviewed-by: Vadim Shtayura <vadimsh@chromium.org>
diff --git a/project.config b/project.config
index 36cd527..16f46b1 100644
--- a/project.config
+++ b/project.config
@@ -246,5 +246,5 @@
 	description = Submit requirement for Release-Owner (go/cros-merge-controls)
 	applicableIf = branch:\"^refs/heads/release-R(13[2-9]|1[4-9][0-9]|[2-9][0-9]{2,}).+\\.B\"
 	submittableIf = label:Release-Owner=MAX
-	overrideIf = uploader:chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com OR uploader:chromeos-ci-release@chromeos-bot.iam.gserviceaccount.com OR uploader:chromeos-ci-release@chromeos-release-bot.iam.gserviceaccount.com OR uploader:mobiletc-prebuild@google.com
+	overrideIf = uploader:chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com OR uploader:chromeos-ci-release@chromeos-bot.iam.gserviceaccount.com OR uploader:chromeos-ci-release@chromeos-release-bot.iam.gserviceaccount.com OR uploader:crostc-worker@crostc-chrotomation.iam.gserviceaccount.com
 	canOverrideInChildProjects = true