New Rule: cap assertion

[nunnatsa]

Description

Trigger warnings for directly assert the builtin cap function.

For example:

Expect(cap(slice)).To(Equal(10)) ==> Expect(slice).To(HaveCap(10))
Expect(cap(slice) == 10).To(BeTrue()) ==> Expect(slice).To(HaveCap(10))

Type of change

• [x] New feature (non-breaking change which adds functionality)
• [x] This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [x] Added test case and related test data
• [x] Update the functional test

Checklist:

• [x] I have performed a self-review of my own code
• [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
• [x] I ran golangci-lint

[coveralls]

Pull Request Test Coverage Report for Build 8280717642

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 66.89%

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Totals
Change from base Build 8227609747:	0.0%
Covered Lines:	200
Relevant Lines:	299

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💛 - Coveralls