Updated github actions to ignore language branch

Old branch filters did not seem to work since they are supposed to
reference the target branch, not source branch.
Instead used if statement to prevent run on crowdin branch.

.github/workflows/phpstan.yml

@@ -1,15 +1,10 @@
 name: phpstan
 
-on:
-  push:
-    branches-ignore:
-      - l10n_development
-  pull_request:
-    branches-ignore:
-      - l10n_development
+on: [push, pull_request]
 
 jobs:
   build:
+    if: ${{ github.ref != 'refs/heads/l10n_development' }}
     runs-on: ubuntu-20.04
     strategy:
       matrix:

.github/workflows/phpunit.yml

@@ -1,15 +1,10 @@
 name: phpunit
 
-on:
-  push:
-    branches-ignore:
-      - l10n_development
-  pull_request:
-    branches-ignore:
-      - l10n_development
+on: [push, pull_request]
 
 jobs:
   build:
+    if: ${{ github.ref != 'refs/heads/l10n_development' }}
     runs-on: ubuntu-20.04
     strategy:
       matrix:

.github/workflows/test-migrations.yml

@@ -1,15 +1,10 @@
 name: test-migrations
 
-on:
-  push:
-    branches-ignore:
-      - l10n_development
-  pull_request:
-    branches-ignore:
-      - l10n_development
+on: [push, pull_request]
 
 jobs:
   build:
+    if: ${{ github.ref != 'refs/heads/l10n_development' }}
     runs-on: ubuntu-20.04
     strategy:
       matrix: