feat: migrate to woodpeckerci

- update build tool for kubernetes auth
- update build tool to build packages without docker (native + buildah)
- add woodpecker pre-commit and build jobs

.woodpecker/build-almalinux8.yaml

@@ -0,0 +1,18 @@
+when:
+  - event: pull_request
+
+steps:
+  - name: build rpms
+    image: git.unkin.net/unkin/almalinux9-rpmbuilder:latest
+    commands:
+      - mkdir -p /app/dist
+      - dnf install buildah -y
+      - ./tools/build build-all --distro almalinux/el8 --buildah
+    privileged: true
+    backend_options:
+      kubernetes:
+        serviceAccountName: default
+  - name: show rpms
+    image: git.unkin.net/unkin/almalinux8-base:latest
+    commands:
+      - find /app/dist -type f -name "*.rpm"