[iOS] Double dash in input field crash fix

[kubaflo]

Description of Change

Using the length of the text based on the value from the iOS's text input rather than a control. It is because of the system's autocorrection that converts some combinations of characters into other symbols.

Issues Fixed

Fixes #20439
Fixes #19954
Fixes #15937

Before	After
crash.mov	fixed.mov

[ghost]

Hey there @kubaflo! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[MartyIX]

file-scoped namespace might be better

[rmarinho]

/rebase

[jsuarezruiz]

Could you take a look to the failing tests? Let me know, If you want me to check them myself.

[ghost]

Hi @kubaflo. We have added the "s/pr-needs-author-input" label to this issue, which indicates that we have an open question/action for you before we can take further action. This PRwill be closed automatically in 14 days if we do not hear back from you by then - please feel free to re-open it if you come back to this PR after that time.

[kubaflo]

@jsuarezruiz Sorry for the late response - I was pretty busy lately :)
I've added a new commit that fixes the tests and the bug

[jsuarezruiz]

@jsuarezruiz Sorry for the late response - I was pretty busy lately :) I've added a new commit that fixes the tests and the bug

Don't worry, thanks for all your contributions. That test are passing now.

[rmarinho]

/azp run MAUI-UITests-public

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