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 08ece3b..c93f34b 100644
--- a/groups
+++ b/groups
@@ -1,5 +1,6 @@
 # UUID                                  	Group Name
 #
+e08dc62e00e5c043b3db69c051b07a17ff85847d	SLSA Policy Verification Service Accounts
 fe5252bd1343fb2de13f1447db3293a200b60bb6	Owners
 global:Anonymous-Users                  	Anonymous Users
 global:Project-Owners                   	Project Owners

project.config

diff --git a/project.config b/project.config
index cf511d0..10fbe00 100644
--- a/project.config
+++ b/project.config
@@ -33,6 +33,8 @@
 	submit = group ldap/plan9port
 	editTopicName = +force group Project Owners
 	editTopicName = +force group ldap/plan9port
+	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
 	read = group Owners