Compass footer - should expand over main page content as it grows #12120

Follow up to core issue: patternfly/patternfly#7938

Core PR - patternfly/patternfly#7988

Released in "@patternfly/patternfly": "6.5.0-prerelease.25"

• Adds .pf-v6-c-compass__main-footer
• Placement is after CompassContent. Should look like below
  
• Removes CompassFooter from the demos