Merge pull request #1656 from splunk/CSPL-4372-add-discovery-of-target-pr

CSPL-4372: Update GitHub workflows to use pull_request_target event

Author: kubabuczak

.github/workflows/build-test-push-workflow.yml

@@ -1,6 +1,6 @@
 name: Build and Test
 on:
-  pull_request: {}
+  pull_request_target: {}
   push:
     branches:
     - main

.github/workflows/distroless-build-test-push-workflow.yml

@@ -1,6 +1,6 @@
 name: Build and Test Distroless
 on:
-  pull_request: {}
+  pull_request_target: {}
   push:
     branches:
     - main

.github/workflows/prodsec-workflow.yml

@@ -1,5 +1,5 @@
 on:
-  pull_request: {}
+  pull_request_target: {}
   push:
     branches:
     - main