Webhook: Need more injection Interface in webhook server

[kdada]

Webhook server only implements inject.Client and inject.Decoder. I think the server should implement all of injection interfaces. Then I can use these interfaces in my webhooks.

[DirectXMan12]

yep, noticed this bug when trying to reword dep injection. the webhook dep injection code is currently wrong -- it should call injectfields in children, and only implement specific injectors for dependencies it needs.

cc @mengqiy

/kind bug
/priority important-soon
/good-first-issue

[k8s-ci-robot]

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In response to this:

yep, noticed this bug when trying to reword dep injection. the webhook dep injection code is currently wrong -- it should call injectfields in children, and only implement specific injectors for dependencies it needs.

cc @mengqiy

/kind bug
/priority important-soon
/good-first-issue

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[DirectXMan12]

this is closed by #323