[DEPLOY-CI] Fix on srcrev conf file in manifest

In the current implementation of Edgehog project, manifest
repositories do not have to contain SRCREV.conf files which are
instead in the conf/SRCREV.conf file of the meta-layer. For this reason
we want to avoid to throw an error when the file is not found
inside the manifest.

scripts/deploy_gitlab_ci.py

@@ -316,9 +316,12 @@ def main():
             manifest_integration["repo"].working_tree_dir, args.srcrev_file
         )
         logging.debug("Read manifest from: %s", srcrev_file_abs)
-        with open(srcrev_file_abs, "r", encoding="utf8") as fp:
-            srcrev = fp.read()
-        logging.debug(srcrev)
+        try:
+            with open(srcrev_file_abs, "r", encoding="utf8") as fp:
+                srcrev = fp.read()
+            logging.debug(srcrev)
+        except:
+            logging.debug("SRCREV.conf file not found on manifest")
 
         for project_integration in project_integrations:
             # Check if project integration belongs to this manifest branch
@@ -372,10 +375,14 @@ def main():
             fp.write(manifest)
         manifest_integration["repo"].git.add(args.manifest_file)
         logging.debug(manifest)
-        with open(srcrev_file_abs, "w", encoding="utf8") as fp:
-            fp.write(srcrev)
-        manifest_integration["repo"].git.add(args.srcrev_file)
-        logging.debug(srcrev)
+        try:
+            with open(srcrev_file_abs, "w", encoding="utf8") as fp:
+                    fp.write(srcrev)
+            manifest_integration["repo"].git.add(args.srcrev_file)
+            logging.debug(srcrev)
+        except:
+            logging.debug("Not writing SRCREV.conf file since not found on manifest")
+
 
         # ========================================================
         # Squash all commits on the integration branch to one