Removing v1alpha2 directory from docs

[robscott]

What type of PR is this?
/kind documentation

What this PR does / why we need it:
The v1alpha2 directory in our docs existed to prevent any old/outdated links from breaking, but I think we've outlived it's usefulness. I'd expect that anything linking to an old v1alpha2 URL is likely several years out of date. This removes that older structure to simplify managing our docs. Thanks to @candita for catching this one!

Does this PR introduce a user-facing change?:

NONE

[candita]

is there still a TLS guide to moved? It used to be in v1alpha2 but I don't see it moved in this PR.

[robscott]

Nope, these were all just symlinks so everything in the directory would have been a copy with the main guides directory.

[candita]

Never mind, I see that these files were just redirects to the folder above.

[candita]

/approve

[shaneutt]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: candita, robscott, shaneutt

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• OWNERS [robscott,shaneutt]

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[candita]

/lgtm

[robscott]

I think Prow is confused, I just rebased this and GitHub UI is not asking for rebase. Maybe this will wake it up.

/honk
/hold cancel

[k8s-ci-robot]

@robscott:

In response to this:

I think Prow is confused, I just rebased this and GitHub UI is not asking for rebase. Maybe this will wake it up.

/honk
/hold cancel

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[candita]

/lgtm