Check if dconf_gnome_enable_smartcard_auth should be part of RHEL9 SRG mapping

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There is documentation for RHEL8 on how to enable the smartcard in the desktop environment. So it seems the rule can be applicable to RHEL8/RHEL9. Why it's not in the RHEL8 STIG is something I don't know.

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/using_the_desktop_environment_in_rhel_8/authenticating-the-user-in-the-desktop-environment_using-the-desktop-environment-in-rhel-8

I believe it makes sense to have it there if the system has GUI.

@Mab879 @jan-cerny what do you think? (note: we've removed the rule from other SRGs in another PR: #8625)

_Originally posted by @ggbecker in https://github.com/ComplianceAsCode/content/issues/8624#issuecomment-1110789138_