Add several functions to mgt-api.js for wsr testing with selenium (backport #13848)

[mergify]

Proposed Changes

Add createQueue and deleteQueue functions required to test wsr functionality in management ui.
And message several changes from tanzu

Types of Changes

What types of changes does your code introduce to this project?
Put an x in the boxes that apply

• Bug fix (non-breaking change which fixes issue #NNNN)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause an observable behavior change in existing systems)
• Documentation improvements (corrections, new content, etc)
• Cosmetic change (whitespace, formatting, etc)
• Build system and/or CI

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This is an automatic backport of pull request #13848 done by [Mergify](https://mergify.com).