Make password prompt specific to authn type

[szh]

Desired Outcome

When running the conjur login command without passing the username and password via command line arguments, the CLI prompts the user to enter a username and password. The text for the password prompt is currently: Enter your password or API key. This is misleading when using LDAP to login because the API key cannot be used to login via authn-ldap. The prompt text should be accurate for both regular authn (default Conjur authentication) and authn-ldap modes.

Implemented Changes

• Set the prompt text based on the authentication strategy configured in conjur init and saved in the .conjurrc file.
• Authn: Enter your Conjur password or API key
• LDAP: Enter your LDAP password

Connected Issue/Story

N/A

Changelog

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• [x] This PR does not include user-facing changes and doesn't require a CHANGELOG update

Test coverage

• [ ] This PR includes new unit and integration tests to go with the code changes, or
• [x] The changes in this PR do not require tests

Documentation

• [ ] Docs (e.g. READMEs) were updated in this PR
• [ ] A follow-up issue to update official docs has been filed here: [insert issue ID]()
• [x] This PR does not require updating any documentation

Behavior

• [ ] This PR changes product behavior and has been reviewed by a PO, or
• [ ] These changes are part of a larger initiative that will be reviewed later, or
• [ ] No behavior was changed with this PR

Security

• [ ] Security architect has reviewed the changes in this PR,
• [ ] These changes are part of a larger initiative with a separate security review, or
• [x] There are no security aspects to these changes