chore: migrate to artifactapi helm virtual repo

- replace all helm repos with artifactapi/virtual/helm
- update projects with accepted repos
- set resource requests/limits for woodpecker jobs

.woodpecker/kubeconform.yaml

@@ -6,3 +6,13 @@ steps:
     image: git.unkin.net/unkin/almalinux9-kubetest:20260319
     commands:
       - make kubeconform
+    backend_options:
+      kubernetes:
+        serviceAccountName: default
+        resources:
+          requests:
+            memory: 512Mi
+            cpu: 1
+          limits:
+            memory: 2Gi
+            cpu: 2

.woodpecker/pre-commit.yaml

@@ -6,3 +6,13 @@ steps:
     image: git.unkin.net/unkin/almalinux9-base:20260308
     commands:
       - uvx pre-commit run --all-files
+    backend_options:
+      kubernetes:
+        serviceAccountName: default
+        resources:
+          requests:
+            memory: 256Mi
+            cpu: 250m
+          limits:
+            memory: 1Gi
+            cpu: 1