Add wif config cluster create option

[JakobGray]

Issue: https://issues.redhat.com/browse/OCM-8008

• Adds --wif-config flag for cluster create
• Adds interactive prompt following CCS for authentication method

Interactive view (select auth type):

? CCS: Yes
? Method of authenticating GCP cluster
? Authentication method:  [Use arrows to move, type to filter]
> Workload Identity Federation (WIF)
  Service account

Interactive view (select WIF config to use):

? CCS: Yes
? Authentication method: Workload Identity Federation (WIF)
? Specifies the GCP Workload Identity Federation config used to authenticate.
? WIF Configuration:  [Use arrows to move, type to filter]
> jdg01 (2crdj6l18l0uqfoqq4873a4alp0t9v4r)

Create cluster help view:

Usage:
  ocm create cluster [flags] NAME

Flags:
      --wif-config string                                     Specifies the GCP Workload Identity Federation config used to authenticate.

[JakobGray]

@ckandag @renan-campos

[renan-campos]

LGTM. Going to do a quick run locally and then I'll merge it