T7579: added workflow for CLA (#427)

* T7579: added workflow for CLA

* T7579: fix of the run trigger for CLA

* added a new line

* added the changelog fragment

* fix a new line character at the end of file

* fixed new line issues (#427) - #427

* removed blank lines (#427)

---------

Co-authored-by: Yevhen Bondarenko <evgeniy.bondarenko@sentrium.io>

Author: lemeshovich

.github/workflows/cla-check.yml

@@ -0,0 +1,15 @@
+name: "CLA Check"
+permissions:
+  actions: write
+  contents: read
+  pull-requests: write
+  statuses: write
+on:
+  pull_request_target:
+    types: [opened, synchronize, closed]
+  issue_comment:
+    types: [created]
+jobs:
+  call-cla-assistant:
+    uses: vyos/vyos-cla-signatures/.github/workflows/cla-reusable.yml@current
+    secrets: inherit

changelogs/fragments/add_cla_workflow.yml

@@ -0,0 +1,3 @@
+---
+trivial:
+  - cla-check.yml - Add a workflow for the checking and signing of Contributor License Agreement (CLA)