fix(cdk/text-field): autosize measure scrollHeight with stable wrapping width

[originalajitest]

Fix cdkTextareaAutosize height under-measurement when the textarea’s wrapping width changes, which could result in clipped content

Fixes 32192

Problem

CdkTextareaAutosize temporarily applies the measuring CSS class (cdk-textarea-autosize-measuring*) while reading scrollHeight. That class changes box-sizing and horizontal padding, which can change the effective wrapping width. When wrapping changes during measurement, scrollHeight can be underestimated, leaving the rendered textarea too short by one or more line.

Solution

• Capture the textarea’s content width (clientWidth minus horizontal padding) before applying the measuring class.
• While measuring, temporarily set style.width to that captured content width so wrapping stays identical to the rendered textarea.
• Restore the previous width immediately after measuring.

Tests

Added a regression test that uses padding + box-sizing: border-box and a wrapping-sensitive value to ensure the measured height matches scrollHeight.

Impact

• Breaking changes: None
• Behavior change: text field no longer will have clipping due to width changes in life span
• Browser compatibility: Fixes the issue in Chrome and Edge (and potentially other browsers)