#6652818 Domains: Add Unlock step and Start step components to the new Transfer flow

Changes proposed in this Pull Request

Adds the Unlock and Start step components to the new Transfer flow (Use a domain I own).
This is part of the domain transfer flow redesign detailed in pcYYhz-hK-p2.

Preview

Start step

Unlock step – when the domain is locked

Unlock step – when checking for the lock status and the domain hasn’t been unlocked yet

Unlock step – when the domain lock status can’t be retrieved

Unlock step is omitted if the domain is unlocked

Testing instructions

• Start the “Use a domain I own” flow with the ?flags=domains/new-transfer-flow query string;
• Check that selecting the “Transfer” option shows the steps added on this PR;
  • Test with locked and unlocked domains. If you don’t have an unlocked/locked domain, you can hack the backend to test it.
• Make sure that the “Connect” option was not affected by any of the changes.