Update cdash.spack.io to be deployed by Helm

Also update our terraform config to:
* Use postgres instead of mysql
* Provision an S3 bucket for CDash to read/write files to
* Create a new ServiceAccount to allow CDash to access this S3 bucket

Author: zackgalbreath

k8s/production/cdash/certificates.yaml

@@ -9,6 +9,5 @@ spec:
   issuerRef:
     name: letsencrypt
     kind: ClusterIssuer
-  commonName: cdash.spack.io
   dnsNames:
   - cdash.spack.io

k8s/production/cdash/configmaps.yaml

@@ -0,0 +1,47 @@
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+  name: kitware
+  namespace: cdash
+spec:
+  interval: 10m
+  url: https://kitware.github.io/helm
+
+---
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: cdash
+  namespace: cdash
+spec:
+  interval: 10m
+  chart:
+    spec:
+      chart: cdash
+      version: 0.2.0
+      sourceRef:
+        kind: HelmRepository
+        name: kitware
+  values:
+    nodeSelector:
+      spack.io/node-pool: base
+
+    cdash:
+      host: cdash.spack.io
+      serviceAccountName: cdash
+      website:
+        resources:
+          requests:
+            memory: 512Mi
+      worker:
+        replicas: 2
+        resources:
+          requests:
+            memory: 512Mi
+
+    postgresql:
+      enabled: false
+
+    minio:
+      enabled: false

k8s/production/cdash/cron-jobs.yaml

@@ -0,0 +1,44 @@
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - ../../production/cdash/certificates.yaml
+  - ../../production/cdash/ingress.yaml
+  - ../../production/cdash/release.yaml
+
+patches:
+  - target:
+      kind: Certificate
+      name: tls-cdash
+      namespace: cdash
+    patch: |-
+      - op: replace
+        path: /spec/dnsNames/0
+        value: cdash.staging.spack.io
+
+  - target:
+      kind: Ingress
+      name: cdash
+      namespace: cdash
+    patch: |-
+      - op: replace
+        path: /spec/rules/0/host
+        value: cdash.staging.spack.io
+
+  - target:
+      kind: HelmRelease
+      name: cdash
+      namespace: cdash
+    patch: |-
+      - op: replace
+        path: /spec/values/cdash/host
+        value: cdash.staging.spack.io
+      - op: replace
+        path: /spec/values/cdash/website/resources/requests/memory
+        value: 50Mi
+      - op: replace
+        path: /spec/values/cdash/worker/replicas
+        value: 1
+      - op: replace
+        path: /spec/values/cdash/worker/resources/requests/memory
+        value: 50Mi