Remove whitespace at the end of storage.vendor (hbmh)

/kind bug

What steps did you take and what happened: I saw whitespace at the end of storage.vendor of HBHM.

k edit hbmh ...

  storage:
  - hctl: "0:0:0:0"
    model: Micron_1100_MTFDDAK256TBN
    name: sda
    serialNumber: 17151756C36D
    sizeBytes: 256060514304
    sizeGB: 256
    vendor: 'ATA     '      <<<--------------------------
    wwn: "0x500a07511756c36d"

Please change the Go code, so that trailing (or leading) whitespace gets removed (for new storage entries, no need to update existing entries).

What did you expect to happen:

Anything else you would like to add: [Miscellaneous information that will assist in solving the issue.]

Environment:

cluster-api-provider-hetzner version:
Kubernetes version: (use kubectl version)
OS (e.g. from /etc/os-release):

syself / cluster-api-provider-hetzner

Remove whitespace at the end of storage.vendor (hbmh) #1279