Add encrypt_keyfile and master_keyfile parameters to FsHelper and the
image setup functions. This allows creating encrypted test images using:
- A key file instead of a passphrase (encrypt_keyfile)
- A specific master key for pre-derived unlock testing (master_keyfile)
The keyfile takes precedence over passphrase when both are provided.
Also reduce Argon2 memory parameters to values suitable for U-Boot
testing.
These new features will allow use of a real TKey for trying out this
feature locally, as well as the emulated TKey for automated testing.
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
daa53f61a9