Update the code with latest KEP

[mukhoakash]

Made the following changes:

1. Introduce the new APIs
2. Fix the code generation to use the generate-internal-groups.sh script
3. Renamed the resource name to follow package name conventions
4. Structured the generated client code
5. Updated the go version and introduced vendor directory
6. Updated README

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[k8s-ci-robot]

Hi @mukhoakash. Thanks for your PR.

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[wlan0]

nicely done @mukhoakash!

[wlan0]

/ok-to-test

[wlan0]

please fix the build errors. Otherwise, it LGTM

[wlan0]

/lgtm

[mukhoakash]

/retest

[mukhoakash]

please fix the build errors. Otherwise, it LGTM

I believe this build error is due to golang version which is set here in the test-infra file. We will have to fix those versions to handle the failures.

[mukhoakash]

/retest

[wlan0]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mukhoakash, wlan0

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