[4.0][com_users] Add cancel action to profile form

[SharkyKZ]

This is an alternative to #24007 and #24087 PRs. Also in a sense solves #17875.

Summary of Changes

Adds cancel task to profile controller to allow the use of <button> element for accessibility reasons.

CC @zwiastunsw @tarot-ray @hardik-codes

Documentation Changes Required

New method added.

[brianteeman]

Looks good

[zwiastunsw]

I have tested this item ✅ successfully on fb65e36

Thanks!

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[SharkyKZ]

Added formnovalidate to the cancel button so the form can be submitted when required fields are missing. @zwiastunsw can you re-test please?

[zwiastunsw]

I have tested this item ✅ successfully on 35cf04e

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[softforge]

I have tested this item ✅ successfully on 35cf04e

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[Quy]

RTC

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[wilsonge]

Much cleaner! Thanks!