BZ-2046109: Removed 9th Gen HP servers from virtual media requirements

[johnwilkins]

This PR:

1. Removes HP 9th Gen servers from the table
2. Updates the comment on HP servers in the note admonition.

Version(s): 4.11, 4.10, 4.9, 4.8, 4.7

Issue: https://bugzilla.redhat.com/show_bug.cgi?id=2046109

Link to docs preview: http://jowilkin.com:8080/BZ-2046109/installing/installing_bare_metal_ipi/ipi-install-prerequisites.html#ipi-install-firmware-requirements-for-installing-with-virtual-media_ipi-install-prerequisites

Signed-off-by: John Wilkins [email protected]