Block submission of patches.json files

See also http://go/pigweed-dependent-cls-v2.

Bug: b/232234662
Change-Id: I1b85eece549d09d10e62e27cbb2b6f767507cd4a
Reviewed-on: https://bluetooth-review.git.corp.google.com/c/All-Projects/+/1100
Reviewed-by: Ted Pudlik <tpudlik@google.com>

project.config

diff --git a/project.config b/project.config
index ddc45e7..2379d91 100644
--- a/project.config
+++ b/project.config
@@ -87,3 +87,8 @@
 	submittableIf = -label:Code-Review=MIN AND label:Code-Review=MAX,user=non_uploader
 	overrideIf = label:Bot-Commit=MAX
 	canOverrideInChildProjects = true
+[submit-requirement "No-Patches-File"]
+	description = Patches are not submittable if they have patches.json in the root of the repo.
+	applicableIf = file:\"^patches\\.json$\"
+	submittableIf = is:false
+	canOverrideInChildProjects = true