feat: Update CustomCloudConfig proto file

[Devinwong]

What type of PR is this? /kind feature

What this PR does / why we need it: Update CustomCloudConfig proto file to use enable_custom_cloud_config Which issue(s) this PR fixes:

Fixes #

Requirements:

• [ ] uses conventional commit messages
• [ ] includes documentation
• [ ] adds unit tests
• [ ] tested upgrade from previous version

Special notes for your reviewer:

• Rename enums for simplicity
• Update LoadBalancerConfig

Release note:

none

[coveralls]

Pull Request Test Coverage Report for Build 8607217012

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 82.077%

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Totals
Change from base Build 8605193868:	0.0%
Covered Lines:	2450
Relevant Lines:	2985

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💛 - Coveralls