Add capi ipam support

[SzymonSAP]

Proposed Changes

• There are ipamConfig and metadata fields added to IroncoreMetalMachineSpec
• For each ipamConfig there is created an IPAddressClaim
• There is a new file added to an ignition which contains metadata and IP addresses
• When machine is deleted the IPAddressClaim is deleted
• Tilt is updated to work with capi ipam
• Tests for creation of an ignition are added

Fixes #66

[SzymonSAP]

Now there is a section:

{
    "storage": {
        "files": [
            ...,
            {
                "contents": {
                    "inline": "{\"bond\":{\"gateway\":\"10.10.10.1\",\"ip\":\"10.10.10.8\",\"prefix\":24},\"foo\":\"bar\"}"
                },
                "mode": 420,
                "path": "/var/lib/metal-cloud-config/metadata"
            }
        ]
    },
    ...
}

present in ignition-... secret when run tilt up.

[defo89]

it seems we are creating an empty file in case no metadata or no IP is claimed. Should we just don't create anything in this case?

      {
        "contents": {
          "inline": "{}"
        },
        "mode": 420,
        "path": "/var/lib/metal-cloud-config/metadata"
      }

[defo89]

looks good, thanks Szymon!