CAFV-326: Make EnableNVidiaGPU into a no-op (#524)

[arunmk]

• Do not customize VM even if EnableNvidiaGPU is set up. The customization that we performed was (slightly) helping customers who would install GPU drivers in GPU nodes directly. However this interferes with the NVIDIA GPU operator functionality.
• Those customers who would install GPU drivers in GPU nodes directly will be impacted by this change. However they can include the customization into their workflow directly since it is a very small customization
• Note that the flag has not yet been deprecated. The next API update should begin to show the deprecation.

(cherry picked from commit a5ab47d)

Description

Please provide a brief description of the changes proposed in this Pull Request

Checklist

• tested locally
• updated any relevant dependencies
• updated any relevant documentation or examples

API Changes

Are there API changes?

• Yes
• No

If yes, please fill in the below

1. Updated conversions?
   • Yes
   • No
   • N/A
2. Updated CRDs?
   • Yes
   • No
   • N/A
3. Updated infrastructure-components.yaml?
   • Yes
   • No
   • N/A
4. Updated ./examples/capi-quickstart.yaml?
   • Yes
   • No
   • N/A
5. Updated necessary files under ./infrastructure-vcd/v1.0.0/?
   • Yes
   • No
   • N/A

Issue

If applicable, please reference the relevant issue

Fixes #CAFV-326 on 1.1.z branch

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This change is 

[lzichong]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @abaruni and @sakthisunda)

[abaruni]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @sakthisunda)