ci: allow test workflows to be called from publish (#229)

addendum for #227

Author: lread

.github/workflows/libs-test.yml

@@ -1,6 +1,8 @@
 name: Libs Test
 
 on:
+  # allow this workflow to be called from other workflows, namely: publish
+  workflow_call:
   push:
     branches:
     - main

.github/workflows/native-image-test.yml

@@ -1,6 +1,8 @@
 name: Native Image Tests
 
 on:
+  # allow this workflow to be called from other workflows, namely: publish
+  workflow_call:
   push:
     branches:
     - main

.github/workflows/unit-test.yml

@@ -1,6 +1,8 @@
 name: Unit Tests
 
 on:
+  # allow this workflow to be called from other workflows, namely: publish
+  workflow_call:
   push:
     branches:
     - main