qubes-release: add template testing repositories

Have them disabled by default.

QubesOS/qubes-issues#3935

qubes-release/qubes-templates.repo

@@ -6,6 +6,13 @@ metadata_expire = 7d
 gpgcheck = 1
 gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-qubes-$releasever-primary
 
+[qubes-templates-itl-testing]
+name = Qubes Templates repository
+baseurl = https://yum.qubes-os.org/r$releasever/templates-itl-testing
+enabled = 0
+gpgcheck = 1
+gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-qubes-$releasever-primary
+
 [qubes-templates-community]
 name = Qubes Community Templates repository
 baseurl = https://yum.qubes-os.org/r$releasever/templates-community
@@ -13,3 +20,10 @@ enabled = 0
 metadata_expire = 7d
 gpgcheck = 1
 gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-qubes-$releasever-templates-community
+
+[qubes-templates-community-testing]
+name = Qubes Community Templates repository
+baseurl = https://yum.qubes-os.org/r$releasever/templates-community-testing
+enabled = 0
+gpgcheck = 1
+gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-qubes-$releasever-templates-community