Remove name field

[mkumatag]

What this PR does / why we need it:

IBMPowerVSMachineSpec does not contain the name field, hence removing this field from the template.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #400

Special notes for your reviewer:

/area provider/ibmcloud

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

NONE

[mkumatag]

/cc @Amulyam24

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[mkumatag]

/cc @wentao-zh

[Amulyam24]

lgtm

[wentao-zh]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Amulyam24, mkumatag, wentao-zh

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