runtime-cleanup: Do not purge pam binaries

[jexposit]

In order to migrate from X.Org to Wayland [1], GNOME Kiosk needs to be run in a new PAM session.

After an update in systemd, the session is failing to start because the PAM binaries are not found with the following error:

Starting user@0.service - User Manager for UID 0...
pam_unix(systemd-user:account): helper binary execve failed: No such file or directory
pam_unix(systemd-user:account): helper binary execve failed: No such file or directory
PAM failed: Authentication service cannot retrieve authentication info
user@0.service: Failed to set up PAM session: Operation not permitted

Do not remove the PAM binaries in /usr/sbin to avoid this issue.

[1] https://github.com/rhinstaller/anaconda/pull/5485

[bcl]

Tests still failing because new python3-coveralls hasn't hit all the mirrors yet (I assume).

[jexposit]

Sure, for the GNOME Remote Desktop work @M4rtinK is doing, he will have to open another PR to preserve libgsm.so* and he'll need https://github.com/weldr/lorax/pull/1384 as well. I'll let you coordinate on building the new image.

[coveralls]

Pull Request Test Coverage Report for Build 8169754312

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 43.521%

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Totals
Change from base Build 7964413895:	0.0%
Covered Lines:	1614
Relevant Lines:	3500

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💛 - Coveralls