Closes #69232

PR Checklist

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• The commit message follows our guidelines: https://github.com/angular/angular/blob/main/contributing-docs/commit-message-guidelines.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• angular.dev application / infrastructure changes
• Other... Please describe:

What is the current behavior?

Currently when using Form Signals with custom elements that implement form association, Angular does not respect the corresponding capabilities, which result in values being read incorrectly or form attributes not being applied, even though they might be applicable.

Issue Number: #69232

What is the new behavior?

Angular now checks whether a given element is a form associated custom element and depending on use case, verifies the capabilities of the custom element (e.g. support for min/max, etc.).
Depending on the custom elementy type property, Angular now also checks whether the value should be read from value, valueAsNumber or valueAsDate.

Does this PR introduce a breaking change?

• Yes
• No

Other information