Use long form text variation

[srambach]

A users has noted that overall, the text size in PatternFly has decreased. This is in line with an overall adjustment to font sizing coming from the larger design community. https://github.com/patternfly/patternfly/issues/6830 gives details and some a11y concerns were addressed in https://github.com/patternfly/patternfly/pull/6846, which introduces rem units to allow text resizing.

We have identified that there are tokens intended for a larger long-form text, but the large size is currently not used outside the text-size utility class.

We need to determine if the org site should adjust itself to use the larger text token or use a utility class; if the content component should be modified to use the larger text for body text, or if a large variant of body text should be created.