fix(makefile): Re-add missing generate target

[0xFelix]

What this PR does / why we need it:

Re-add the missing generate target to the dist/common-templates.yaml target.

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 #

Special notes for your reviewer:

Release note:

None

[kubevirt-bot]

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[0xFelix]

/cherry-pick release-v0.32

[kubevirt-bot]

@0xFelix: new pull request created: #659

In response to this:

/cherry-pick release-v0.32

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