refactor: remove legacy controller Docker build (#1360) [skip ci]

* refactor: remove legacy build and use buildkit

* refactor: add runner version to root makefie

* refactor: enable buildkit for runner make build

* refactor: ignore runner makefile in ci

Co-authored-by: toast-gear <toast-gear@users.noreply.github.com>

.github/renovate.json5

@@ -21,7 +21,8 @@
     },
     {
       "fileMatch": [
-        "runner/Makefile"
+        "runner/Makefile",
+        "Makefile"
       ],
       "matchStrings": ["RUNNER_VERSION \\?= +(?<currentValue>.*?)\\n"],
       "depNameTemplate": "actions/runner",

.github/workflows/runners.yml

@@ -11,6 +11,7 @@ on:
       - 'master'
     paths:
       - 'runner/**'
+      - '!runner/Makefile'
       - .github/workflows/runners.yml
       - '!**.md'