Drop function requested resources vs limit validation from the serverless webhook

[kwiatekus]

Description
Comparing if requested cpu and memory resources do not exceed (cpu and memory) limits should be dropped from validation webhook.

Misconfigured function specs should show an error message in status.conditions

Reasons
Our goal is to remove serverless webhook ( see the linked epic )

Attachments
kubernetes-sigs/controller-tools#827

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[dbadura]

Example error of wrongly confifured resources for function:

    {
      "lastTransitionTime": "2023-11-23T10:31:30Z",
      "message": "Function limits cpu(100m) should be higher than requests cpu(250m). Function limits memory(100Mi) should be higher than requests memory(150Mi)",
      "reason": "InvalidFunctionSpec",
      "status": "False",
      "type": "ConfigurationReady"
    },