Docs - Update progress and progress stepper guidelines.

[edonehoo]

Follow-up to https://github.com/patternfly/patternfly-org/pull/4660/files#diff-ef5513f1b17b9ef7e79ef3b004c1a52d178a1dd7f7490c6ff066efd2588fb970

Progress:

• In usage section, add “when to use progress bar vs stepper” for the current content
• Broken content link
• Figure out determinate vs indeterminate sections. Is this necessary? These aren’t actual variants
• For in progress section - Change “blue”/”red” to “primary” or “active” etc (whatever the token is)
• Add a table image with 2 progress columns to support “If your table includes multiple progress bars, designate a “Status” or “Progress” column for each one.”
• broken link to toast alerts
• Move placement image below intro text
• Swap dont and do table columns in content section

Progress stepper:

• Make lists parallel - end in periods
• Some slight readability / concision things throughout. Generally, edit the content
• Replace use of “real estate” with “space”
• Swap do/don’t column order in content considerations section