[CI] Run Linux Buildbot Pods on Buildbot Nodes

This patch updates dispatch_job.py to actually run the nodes that the buildbot
worker spawns on the buildbot nodes. Otherwise they default to the service nodes
which only have four cores. Overloading the service nodes could also easily
become a problem.

Author: boomanaiden154

zorg/buildbot/builders/annotated/premerge/dispatch_job.py

@@ -42,11 +42,24 @@ def start_build(k8s_client, pod_name: str, namespace: str, commands: list[str])
             "namespace": namespace,
         },
         "spec": {
+            "tolerations": [
+                {
+                    "key": "buildbot-platform",
+                    "operator": "Equal",
+                    "value": "linux",
+                    "effect": "NoSchedule",
+                }
+            ],
+            "nodeSelector": {"buildbot-platform": "linux"},
             "containers": [
                 {
                     "name": "build",
                     "image": "ghcr.io/llvm/ci-ubuntu-24.04",
                     "command": commands,
+                    "resources": {
+                        "requests": {"cpu": 55, "memory": "200Gi"},
+                        "limits": {"cpu": 64, "memory": "256Gi"},
+                    },
                 }
             ],
             "restartPolicy": "Never",