chore: bring in new release automation to 2.8.x (#12014)

.github/jsonnetfile.json

@@ -0,0 +1,15 @@
+{
+  "version": 1,
+  "dependencies": [
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/grafana/loki-release.git",
+          "subdir": "workflows"
+        }
+      },
+      "version": "release-1.11.x"
+    }
+  ],
+  "legacyImports": true
+}

.github/jsonnetfile.lock.json

@@ -0,0 +1,16 @@
+{
+  "version": 1,
+  "dependencies": [
+    {
+      "source": {
+        "git": {
+          "remote": "https://github.com/grafana/loki-release.git",
+          "subdir": "workflows"
+        }
+      },
+      "version": "1d6247891e2b9d68d38403d7a6c63b9285ff640f",
+      "sum": "aQpCoAM3E9srNOL9f0tsdB/qlKCEEfUjj38u1deUD1w="
+    }
+  ],
+  "legacyImports": false
+}

.github/release-workflows.jsonnet

@@ -0,0 +1,60 @@
+local lokiRelease = import 'workflows/main.jsonnet';
+local build = lokiRelease.build;
+{
+  'patch-release-pr.yml': std.manifestYamlDoc(
+    lokiRelease.releasePRWorkflow(
+      imageJobs={
+        loki: build.image('loki', 'cmd/loki'),
+        fluentd: build.image('fluentd', 'clients/cmd/fluentd', platform=['linux/amd64']),
+        'fluent-bit': build.image('fluent-bit', 'clients/cmd/fluent-bit', platform=['linux/amd64']),
+        logstash: build.image('logstash', 'clients/cmd/logstash', platform=['linux/amd64']),
+        logcli: build.image('logcli', 'cmd/logcli'),
+        'loki-canary': build.image('loki-canary', 'cmd/loki-canary'),
+        'loki-operator': build.image('loki-operator', 'operator', context='release/operator', platform=['linux/amd64']),
+        promtail: build.image('promtail', 'clients/cmd/promtail'),
+        querytee: build.image('querytee', 'cmd/querytee', platform=['linux/amd64']),
+      },
+      buildImage='grafana/loki-build-image:0.29.3-go1.20.10',
+      branches=['release-[0-9]+.[0-9]+.x'],
+      checkTemplate='grafana/loki-release/.github/workflows/check.yml@release-1.11.x',
+      golangCiLintVersion='v1.51.2',
+      imagePrefix='grafana',
+      releaseRepo='grafana/loki',
+      skipArm=false,
+      skipValidation=false,
+      versioningStrategy='always-bump-patch',
+    ), false, false
+  ),
+  'minor-release-pr.yml': std.manifestYamlDoc(
+    lokiRelease.releasePRWorkflow(
+      imageJobs={
+        loki: build.image('loki', 'cmd/loki'),
+        fluentd: build.image('fluentd', 'clients/cmd/fluentd', platform=['linux/amd64']),
+        'fluent-bit': build.image('fluent-bit', 'clients/cmd/fluent-bit', platform=['linux/amd64']),
+        logstash: build.image('logstash', 'clients/cmd/logstash', platform=['linux/amd64']),
+        logcli: build.image('logcli', 'cmd/logcli'),
+        'loki-canary': build.image('loki-canary', 'cmd/loki-canary'),
+        'loki-operator': build.image('loki-operator', 'operator', context='release/operator', platform=['linux/amd64']),
+        promtail: build.image('promtail', 'clients/cmd/promtail'),
+        querytee: build.image('querytee', 'cmd/querytee', platform=['linux/amd64']),
+      },
+      buildImage='grafana/loki-build-image:0.29.3-go1.20.10',
+      branches=['k[0-9]+'],
+      checkTemplate='grafana/loki-release/.github/workflows/check.yml@release-1.11.x',
+      golangCiLintVersion='v1.51.2',
+      imagePrefix='grafana',
+      releaseRepo='grafana/loki',
+      skipArm=false,
+      skipValidation=false,
+      versioningStrategy='always-bump-minor',
+    ), false, false
+  ),
+  'release.yml': std.manifestYamlDoc(
+    lokiRelease.releaseWorkflow(
+      branches=['release-[0-9]+.[0-9]+.x', 'k[0-9]+'],
+      getDockerCredsFromVault=true,
+      imagePrefix='grafana',
+      releaseRepo='grafana/loki',
+    ), false, false
+  ),
+}