[Bug]: Using --force doesn't force overwrite output file of step crypto key format

[merlinz01]

Steps to Reproduce

$ step crypto keypair pub.pem priv.pem --no-password --insecure
Your public key has been saved in pub.pem.
Your private key has been saved in priv.pem.
$ step crypto key format priv.pem --pkcs8 --pem --force --out priv.pem --no-password --insecure 
✔ Would you like to overwrite priv.pem [y/n]: y
Your key has been saved in priv.pem.

Your Environment

• OS - Linux Mint 21,3
• step CLI Version - Smallstep CLI/0.26.1 (linux/amd64) Release Date: 2024-04-23T00:08:02Z

Expected Behavior

No prompt when saving the key because --force is used.

Actual Behavior

The step crypto key format command still prompts to confirm overwrite even when --force is used.

Additional Context

This makes a small inconvenience for automation.

Contributing

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