chore: clean up schema registration

[tallaxes]

Description

Ensure init() blocks driving schema registration are in top-level drivers (operator and environments). The rationale is best captured in aws/karpenter-provider-aws#5086:

This PR moves the init statements that were present in the cloudprovider.go file to put them in the top-level operator.go file since all operator concepts rely on karpenter-core. This makes the dependencies required here clearer and serves as a paradigm that will be used going forward for declaring all base-level dependencies in operator.go files

This is already partially in place; this PR completes the move.

How was this change tested?

• make presubmit

Does this change impact docs?

• Yes, PR includes docs updates
• Yes, issue opened: #
• No

Release Note

[coveralls]

Pull Request Test Coverage Report for Build 8904804242

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 97.774%

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Totals
Change from base Build 8904783546:	0.0%
Covered Lines:	36281
Relevant Lines:	37107

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💛 - Coveralls

[Bryce-Soghigian]

Can you help me understand a bit more why Chesterton placed the fence here?

[tallaxes]

Can you help me understand a bit more why Chesterton placed the fence here?

Please wait until the PR is out of Draft before reviewing