[helm] Fix liveness/readiness probe scheme path in templates (#7616)

Fix the templates to read scheme from httpGet.scheme instead of the
probe level, matching the structure defined in values.yaml.

This ensures that changing *.livenessProbe.httpGet.scheme or
*.readinessProbe.httpGet.scheme in values.yaml now correctly affects
the rendered manifests.

Affected components: master, filer, volume, s3, all-in-one

Fixes #7615

k8s/charts/seaweedfs/Chart.yaml

@@ -3,4 +3,4 @@ description: SeaweedFS
 name: seaweedfs
 appVersion: "4.01"
 # Dev note: Trigger a helm chart release by `git tag -a helm-<version>`
-version: 4.0.401
+version: 4.0.401