Missing quotes in generated configs

[rynge]

This was mentioned on Slack, but i wanted to make sure it does not get forgotten about. For GPU entries, we get a lot of misconfiguration errors in the HTCondor logs:

12/13/23 02:09:18 (pid:2762) CONFIGURATION PROBLEM: Failed to insert ClassAd attribute GLIDEIN_Resource_Slots = GPUs,2,type=main.  The most common reason for this is that you forgot to quote a string value in the list of attributes being added to the STARTD ad.

TRUST_DOMAIN has similar problem, but for all glideins:

12/13/23 01:46:42 (pid:2762) CONFIGURATION PROBLEM: Failed to insert ClassAd attribute TRUST_DOMAIN = cm-1.ospool.osg-htc.org:9618?sock=collectorRANDOM.  The most common reason for this is that you forgot to quote a string value in the list of attributes being added to the STARTD ad.

[namrathaurs]

Just adding a note here that this seems to be related to #427