Update Flux to 0.37.0

Package	Update	Change
registry1.dso.mil/ironbank/fluxcd/helm-controller	minor	v0.26.0 -> v0.27.0
registry1.dso.mil/ironbank/fluxcd/kustomize-controller	minor	v0.30.0 -> v0.31.0
registry1.dso.mil/ironbank/fluxcd/notification-controller	minor	v0.28.0 -> v0.29.0
registry1.dso.mil/ironbank/fluxcd/source-controller	minor	v0.31.0 -> v0.32.1

Closes https://repo1.dso.mil/platform-one/big-bang/bigbang/-/issues/1356

base/flux/kustomization.yaml

@@ -6,13 +6,13 @@ resources:
 images:
 - name: ghcr.io/fluxcd/helm-controller
   newName: registry1.dso.mil/ironbank/fluxcd/helm-controller
-  newTag: v0.26.0
+  newTag: v0.27.0
 - name: ghcr.io/fluxcd/kustomize-controller
   newName: registry1.dso.mil/ironbank/fluxcd/kustomize-controller
-  newTag: v0.30.0
+  newTag: v0.31.0
 - name: ghcr.io/fluxcd/notification-controller
   newName: registry1.dso.mil/ironbank/fluxcd/notification-controller
-  newTag: v0.28.0
+  newTag: v0.29.0
 - name: ghcr.io/fluxcd/source-controller
   newName: registry1.dso.mil/ironbank/fluxcd/source-controller
   newTag: v0.31.0