github: workflow trigger optimizations (#3030)

.github/workflows/lint_and_submodule_check.yml

@@ -1,11 +1,6 @@
 name: 'Lint sources & check submodule integrity'
 
 on:
-  push:
-    branches:
-      - dev
-    tags:
-      - '*'
   pull_request:
 
 env:
@@ -15,7 +10,7 @@ env:
 
 jobs:
   lint_sources_check_submodules:
-    runs-on: [self-hosted,FlipperZeroShell]
+    runs-on: [self-hosted, FlipperZeroShell]
     steps:
       - name: 'Wipe workspace'
         run: find ./ -mount -maxdepth 1 -exec rm -rf {} \;