Fix 1.22 Webhook Create by ensuring v1 is used

[ukclivecox]

What this PR does / why we need it:

• Ensure v1 and not v1beta1 Webhook is created when managerCreateResources=true
• Add extra logging to help with any failures and fixes missing catches of errors not handled

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[axsaucedo]

Updates look good, would be worth adding a note on the UPGRADING.md page just as heads up that this would be the case.

I just ran a test locally with 1.11.2 to test --set managerCreateResources=true to validate that the upgrade actually works, and I can confirm there are no issues, but also I've realised that there's actually no difference that this changes add as the webhook loaded from file is created as v1 even in 1.11.2 when managerCreateResources is true.

Another thing I noticed is that the webhook in the helm chart is created with name seldon-validating-webhook-configuration-seldon-system whereas the controller creates it with the name seldon-validating-webhook-configuration - may be worth aligning the names (can be done as separate PR)

/approve

[seldondev]

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This pull-request has been approved by: axsaucedo

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[seldondev]

Failed to merge this PR due to:

failed merging [3736]: [Method Not Allowed]