define encryption_key and encryption_password same time

[guazhangRH]

      vars:
        storage_safe_mode: false
        storage_pools:
          - name: foo
            type: lvm
            disks: "{{ unused_disks }}"
            volumes:
              - name: test1
                mount_point: "{{ mount_location }}"
                size: 4g
                encryption: true
                encryption_key: "{{ storage_test_key_file.path }}"
                encryption_luks_version: luks2
                encryption_key_size: 256
                encryption_cipher: "{{ __luks_cipher }}"
                encryption_password: yabbadabbadoo

# cryptsetup luksDump /dev/mapper/foo-test1 
LUKS header information
Version:       	2
Epoch:         	4
Metadata area: 	16384 [bytes]
Keyslots area: 	16744448 [bytes]
UUID:          	4bda8802-8d8f-4c09-a25e-9339f7ac4aa4
Label:         	(no label)
Subsystem:     	(no subsystem)
Flags:       	(no flags)

Data segments:
  0: crypt
	offset: 16777216 [bytes]
	length: (whole device)
	cipher: aes-xts-plain64
	sector: 512 [bytes]

Keyslots:
  0: luks2
	Key:        256 bits
	Priority:   normal
	Cipher:     aes-xts-plain64
	Cipher key: 256 bits
	PBKDF:      argon2id
	Time cost:  4
	Memory:     1019850
	Threads:    4
	Salt:       fd 28 27 64 29 a4 45 02 b8 ff cc 36 e5 5e da 00 
	            20 3e 34 65 5e b4 7f c8 9f d7 57 76 2a fa df 35 
	AF stripes: 4000
	AF hash:    sha256
	Area offset:32768 [bytes]
	Area length:131072 [bytes]
	Digest ID:  0
  1: luks2
	Key:        256 bits
	Priority:   normal
	Cipher:     aes-xts-plain64
	Cipher key: 256 bits
	PBKDF:      argon2id
	Time cost:  4
	Memory:     1048576
	Threads:    4
	Salt:       53 55 fd 2c 3b 9f f6 09 1f 9d 5e 88 9c 16 32 09 
	            ba 6b 47 96 c3 f8 e9 a8 4a 03 35 6a 97 b5 f2 3c 
	AF stripes: 4000
	AF hash:    sha256
	Area offset:163840 [bytes]
	Area length:131072 [bytes]
	Digest ID:  0
Tokens:
Digests:
  0: pbkdf2
	Hash:       sha256
	Iterations: 182297
	Salt:       86 e2 2a ab 7c ec a4 7a 42 c2 a1 9d e4 ff a7 d8 
	            c9 35 32 73 b0 ff 1b 5f c9 c9 b6 56 9e cf 71 79 
	Digest:     26 b0 aa cd 5d 92 1a ee 0d 9e 10 15 a7 e3 a1 90 
	            f7 bc 94 8e 40 bd 47 06 a0 e9 21 29 f3 cf e9 f8 

looks it has added two slot key here, should we consider to add some tests for it ?