Add dependabot.yaml to enable PRs (#17620)

We need dependabot enabled to get higher score on the OSSF scorecard
https://github.com/ossf/scorecard/blob/main/docs/checks.md#dependency-update-tool
and here https://clomonitor.io/projects/cncf/harbor

Signed-off-by: OrlinVasilev <ovasilev@vmware.com>

Signed-off-by: OrlinVasilev <ovasilev@vmware.com>
Co-authored-by: OrlinVasilev <ovasilev@vmware.com>

.github/dependabot.yml

@@ -0,0 +1,25 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+
+# Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "gomod"
+    directory: "tests/"
+    schedule:
+      interval: "weekly"
+  
+  # More will be needed