fix(cdk/text-field): avoid page jump on firefox (#23296)
fix(cdk/text-field): avoid page jump on firefox (#23296)

When we measure the size of the autosize `textarea`, we make it temporarily smaller which can cause the scroll position to shift on Firefox. These changes add a workaround that assign a temporary `margin-bottom` while measuring.

Fixes #23233.
angular/components,josephperrott/material2,angular/components,crisbeto/material2,angular/components,crisbeto/material2,josephperrott/material2,crisbeto/material2,angular/components,josephperrott/material2,josephperrott/material2,crisbeto/material2,josephperrott/material2