Add compliance to CKV2_GHA_1 security check

Author: Sebastien Stormacq

.github/workflows/integration_tests.yml

@@ -1,5 +1,8 @@
 name: IntegrationTests
 
+# As per Checkov CKV2_GHA_1
+permissions: read-all
+
 on:
   workflow_call:
     inputs:

.github/workflows/pull_request.yml

@@ -4,6 +4,9 @@ on:
   pull_request:
     types: [opened, reopened, synchronize]
 
+# As per Checkov CKV2_GHA_1
+permissions: read-all
+
 jobs:
   soundness:
     name: Soundness