Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
When i deploy application on a cluster with multiples namespace, i'm actually able to save secret via push resource with specfiying the key for my secret.

But in some case i didn't know the key, because i don't manage the secret from tje application, but i need to be able to backup this secrets in a secret manager in my case vault and aws.

Is it actually possible to without specifiying a key that reference a secret to push all secret in a namespace without knowing the type of secret (generic,TLS) ?

Like if pushsecret can select namespace by label or something ?

Thanks