Use for CI reusable workflows for DRY (#350)

We can use across all the repositories of plugins and apps
the same reusable workflow which give us the ability to
change only one file instead of multiple and apart from this the ability to use different versions as we prefer.

Ticket: https://mattermost.atlassian.net/browse/CLD-4681

.github/workflows/cd.yml

@@ -0,0 +1,17 @@
+name: cd
+on:
+  workflow_run:
+    workflows: ["ci"]
+    types:
+      - completed
+  push:
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+"
+
+permissions:
+  contents: read
+
+jobs:
+  plugin-cd:
+    uses: mattermost/actions-workflows/.github/workflows/plugin-cd.yml@11369c571c4a721bfaca5d9c7f3920c201e79a20
+    secrets: inherit

.github/workflows/ci.yml

@@ -0,0 +1,16 @@
+name: ci
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+"
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  plugin-ci:
+    uses: mattermost/actions-workflows/.github/workflows/plugin-ci.yml@11369c571c4a721bfaca5d9c7f3920c201e79a20
+    secrets: inherit