feat(textfield): add rows attribute

[ingorichter]

Description

Adding the rows attribute to enable a multiline Textarea to show up with a predefined amount of rows. We need this feature for an existing feature where we replace all react-spectrum components with spectrum-web-components.

Related issue(s)

• [Feat]: Add rows attribute to enable multiline Textarea with a predefined amount of visible lines #3331

Motivation and context

Product required for Adobe Share Dialog

How has this been tested?

• Test case 1
  1. Go here
  2. Do this
• Test case 2
  1. Go here
  2. Do this

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)

Checklist

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• If my change required a change to the documentation, I have updated the documentation in this pull request.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have reviewed at the Accessibility Practices for this feature, see: Aria Practices

Best practices

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[Westbrook]

Does the use of rows negate any of the resize values?

[Westbrook]

Using ifDefined here makes sense. Does it imply the type of rows should be rows?: number?

[ingorichter]

Good point, yes, it should be optional. Making it optional, the compiler will warn that this.rows might be undefined. IfDefined doesn't help with that situation. I followed some other properties like maxlength and minlength. They are optional, but not declared to be optional. Should I leave it as is? Or provide a getter for the property to check for undefined and > -1?

[ingorichter]

@Westbrook using the rows attribute will definitely change the resize value to prevent any resizing of multiline textareas

[ingorichter]

Closing this PR in favor of this PR #3356