Redact tokens from `--debug` log

[jiasli]

Context

1. Starting from azure-core 1.13.0, Authorization header is now exposed in DEBUG log (Make NetworkTraceLoggingPolicy show the auth token in plain text azure-sdk-for-python#17424).
2. Python SDK decided not to redact x-ms-authorization-auxiliary header (x-ms-authorization-auxiliary header should be redacted azure-sdk-for-python#17271).

Before bumping azure-core to 1.13.0, Azure CLI must adapt to azure-core's new behavior.

Proposed solutions

For tokens in Authorization and x-ms-authorization-auxiliary:

1. Keep the current behavior and redact tokens.
2. Expose tokens in --debug mode like the new NetworkTraceLoggingPolicy.
   1. Unconditionally do so, but redact tokens in --verbose.
   2. Make a config like az config set logging.show_tokens=True.

[yonzhan]

Core