fix(build): add `go-get-tool` function in makefile of KubeArmorOperator

[Affan-7]

Purpose of PR?:

Add a handy go-get-tool function to install go packages.

Fixes #1609

Does this PR introduce a breaking change? No

Checklist:

• [x] Bug fix. Fixes #1609
• [ ] 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
• [ ] PR Title follows the convention of <type>(<scope>): <subject>
• [ ] Commit has unit tests
• [ ] Commit has integration tests

Screenshot:

[Affan-7]

CC: @rootxrishabh