chore: Gosec - enable security linting (#585)

#### What this PR does / why we need it

see: open-component-model/ocm-project#270

#### Which issue(s) this PR fixes

fixes: #583

Author: hilmarf

.github/workflows/code-scan.yml

@@ -0,0 +1,20 @@
+name: "Code scanning"
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+  schedule:
+    - cron: "26 14 * * 2"
+
+jobs:
+  gosec:
+    permissions:
+      # Required to upload SARIF files
+      security-events: write
+      # for actions/checkout to fetch code
+      contents: read
+    # call reusable workflow from central '.github' repo
+    uses: open-component-model/.github/.github/workflows/code-scan.yml@main
+    secrets: inherit