No ticket - Point glean submodule to release branch (#5201)

* Point glean submodule to release branch

* Fix linux script git fetch

* Add new required property to Glean init

* Attempt to get CI unstuck

.gitmodules

@@ -28,4 +28,4 @@
 [submodule "3rdparty/glean"]
 	path = 3rdparty/glean
 	url = https://github.com/mozilla/glean.git
-	branch = main
+	branch = release

scripts/linux/script.sh

@@ -132,7 +132,7 @@ print Y "Update the submodules..."
 git submodule init || die "Failed"
 git submodule update --remote --depth 1 i18n || die "Failed"
 git submodule update --remote --depth 1 3rdparty/wireguard-tools || die "Failed"
-git submodule update --remote --depth 1 3rdparty/glean || die "Failed"
+git submodule update --depth 1 3rdparty/glean || die "Failed"
 print G "done."
 
 print G "Creating the orig tarball"

vpnglean/src/lib.rs

@@ -34,6 +34,7 @@ pub extern "C" fn glean_initialize(is_telemetry_enabled: bool, data_path: FfiStr
         uploader: Some(Box::new(VPNPingUploader::new())),
         // Whether Glean should schedule “metrics” pings for you
         use_core_mps: true,
+        trim_data_to_registered_pings: false,
     };
 
     let client_info = ClientInfoMetrics {