[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/values.yaml

@@ -1133,7 +1133,7 @@ allInOne:
     httpGet:
       path: /cluster/status
       port: 9333
-    scheme: HTTP
+      scheme: HTTP
     initialDelaySeconds: 10
     periodSeconds: 15
     successThreshold: 1
@@ -1145,7 +1145,7 @@ allInOne:
     httpGet:
       path: /cluster/status
       port: 9333
-    scheme: HTTP
+      scheme: HTTP
     initialDelaySeconds: 20
     periodSeconds: 30
     successThreshold: 1