Support kind v0.8 in build scripts

[makkes]

What would you like to be added:
#1221 adds support for kind v0.7 but according to the v0.8.0 release notes, the newest version introduces breaking changes that prevent using it in the build scripts such as scripts/create-clusters.sh or scripts/pre-commit.sh.

Why is this needed:
The kind docs will lead to users installing always the latest version. If that doesn't work with kubefed scripts, adoption will slow down.

/kind feature

[fejta-bot]

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/lifecycle stale

[fejta-bot]

Stale issues rot after 30d of inactivity.
Mark the issue as fresh with /remove-lifecycle rotten.
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/lifecycle rotten

[makkes]

/remove-lifecycle rotten

I may have the opportunity to tackle this in the coming weeks.

[makkes]

@jimmidyson is working on kind v0.9 support in #1303, so I'll close this.