add enable webhook flag

[OliverMKing]

Description

Adds enable webhook flag which allows webhook to be toggled on or off.

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

e2e and unit tested + tested locally

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules

[coveralls]

Pull Request Test Coverage Report for Build 7022509115

• 23 of 62 (37.1%) changed or added relevant lines in 2 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.2%) to 79.984%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/controller/controller.go	0	39	0.0%
<!--	Total:	23	62	37.1%	-->

Files with Coverage Reduction	New Missed Lines	%
pkg/controller/controller.go	3	16.98%
<!--	Total:	3		-->

Totals
Change from base Build 7009493370:	-0.2%
Covered Lines:	2953
Relevant Lines:	3692

---

💛 - Coveralls

[OliverMKing]

/ok-to-test sha=d3d7e0f

[OliverMKing]

/ok-to-test sha=72f0897