Stuck helm release in pending-install are replaced (SURE-10627)

[manno]

Also allows atomic flag for install, not just update.

Notes

Get a chart into pending install:

fleet apply -o timeout-frab-bundle.yaml test ../../frab/helm/frab
fleet target -b timeout-frab-bundle.yaml > timeout-frab-bundledeployment.yaml
fleet deploy -i timeout-frab-bundledeployment.yaml
# hit ctrl-c while the helm hooks run

If the timing is right, this results in a helm chart that is in pending-install:

apiVersion: v1
data:
  release: [...blob...]
kind: Secret
metadata:
  labels:
    name: frab-helm-frab-02710957
    owner: helm
    status: pending-install
    version: "1"
  name: sh.helm.release.v1.frab-helm-frab-02710957.v1
  namespace: default
type: helm.sh/release.v1

Another deploy results in:

% fleet deploy  -i timeout-frab-bundledeployment.yaml                                                                                                                                                                    
2025-08-22T14:34:59+02:00	INFO	helm-deployer.install	Installing helm release	{"commit": "", "dryRun": false}
FATA[0000] cannot re-use a name that is still in use

Now we can try this PR:

% go run ./cmd/fleetcli/main.go  deploy  -i timeout-frab-bundledeployment.yaml                                                                                                                                           
2025-08-22T14:36:00+02:00	INFO	helm-deployer.install	Uninstalling helm release first	{"commit": "", "dryRun": true}
2025-08-22T14:36:00+02:00	INFO	helm-deployer.install	Uninstalling helm release first	{"commit": "", "dryRun": false}
2025-08-22T14:36:00+02:00	INFO	helm-deployer.delete	Helm: Uninstalling	{"dryRun": false}
2025-08-22T14:36:00+02:00	DEBUG	helmSDK	uninstall: Deleting frab-helm-frab-02710957
2025-08-22T14:36:00+02:00	DEBUG	helmSDK	uninstall: given cascade value: , defaulting to delete propagation background
2025-08-22T14:36:00+02:00	DEBUG	helmSDK	purge requested for frab-helm-frab-02710957
2025-08-22T14:36:01+02:00	INFO	helm-deployer.install	Installing helm release	{"commit": "", "dryRun": false}
2025-08-22T14:36:01+02:00	DEBUG	helmSDK	API Version list given outside of client only mode, this list will be ignored
FATA[0000] failed pre-install: context deadline exceeded
exit status 1
go run ./cmd/fleetcli/main.go deploy -i   115,26s user 24,96s system 528% cpu 26,542 total

Still fails, because the chart is missing arm64 images, but we can see the uninstall.

[kkaempf]

See #4049