Revert "Switch all platforms artifacts to use the new build system"

This reverts commit 95c7ecd562029d7ff23ec303ba281234831a0d57.
diff --git a/lava_helper/lava_create_jobs.py b/lava_helper/lava_create_jobs.py
index 2e803c3..71baa3f 100755
--- a/lava_helper/lava_create_jobs.py
+++ b/lava_helper/lava_create_jobs.py
@@ -53,7 +53,13 @@
     if params["device_type"] == "fvp":
         platform = "fvp"
 
-    url = "{}/artifact/trusted-firmware-m/build/bin/{}".format(artifact_store_url.rstrip("/"), filename)
+    # FIXME: temporary workaround until we switch all platforms artifacts
+    #        to use the same location (new build system)
+    url = "{}/artifact/trusted-firmware-m/build".format(artifact_store_url.rstrip("/"))
+    if platform.lower().startswith("musca"):
+        url = "{}/bin/{}".format(url, filename)
+    else:
+        url = "{}/install/outputs/{}/{}".format(url, platform, filename)
     return url