Fixes naming convention permission check for data items with path attribute.

[vladlosev]

The permission checking code is currently ignoring the path attributes when evaluating. This results in permission checks for secrets defined like this:

apiVersion: kubernetes-client.io/v1
kind: ExternalSecret
metadata:
  name: test
spec:
  backendType: systemManager
  data:
  - path: dev/team-a/secret

with the error message ERROR, not allowed to fetch secret: test/test: key name undefined does not match naming convention ^dev/team-a/.*.
This PR adds handling of the path attribute in the permissions check.

[vladlosev]

@Flydiverny can you please take a look at this? The problem this fixes is also a security vulnerability where the access check is performed on the key attribute whereas the values are fetched using the path attribute.

[Flydiverny]

Sorry for the wait, just one minor thought