Update Gerrit permissions for global service users (built at http://cl/893733512)

Added permissions:
  Section [refs/heads/*]:
    Read:
      ALLOW: SLSA Policy Verification Service Accounts
    label-SLSA-Policy-Verified:
      ALLOW: SLSA Policy Verification Service Accounts

groups

diff --git a/groups b/groups
index 9ef3400..4064938 100644
--- a/groups
+++ b/groups
@@ -1,7 +1,8 @@
-# UUID                 	Group Name
+# UUID                                  	Group Name
 #
-global:Anonymous-Users 	Anonymous Users
-global:Project-Owners  	Project Owners
-global:Registered-Users	Registered Users
-mdb:copybara-piper     	mdb/copybara-piper
-mdb:mundane-admins     	mdb/mundane-admins
+42407a81c9819ad354fcb80f162a0b1eebcee250	SLSA Policy Verification Service Accounts
+global:Anonymous-Users                  	Anonymous Users
+global:Project-Owners                   	Project Owners
+global:Registered-Users                 	Registered Users
+mdb:copybara-piper                      	mdb/copybara-piper
+mdb:mundane-admins                      	mdb/mundane-admins

project.config

diff --git a/project.config b/project.config
index 5a4bda5..8c860bc 100644
--- a/project.config
+++ b/project.config
@@ -31,6 +31,8 @@
 	push = group mdb/mundane-admins
 	submit = group Project Owners
 	submit = group mdb/mundane-admins
+	label-SLSA-Policy-Verified = -1..+1 group SLSA Policy Verification Service Accounts
+	Read = group SLSA Policy Verification Service Accounts
 [access "refs/meta/config"]
 	exclusiveGroupPermissions = read
 	create = group Project Owners