users: Move query into caller of get_custom_profile_field_values.
users: Move query into caller of get_custom_profile_field_values.

This will be useful for supporting a smaller query for a single user.

timabbott/zulip,andersk/zulip,brainwane/zulip,timabbott/zulip,kou/zulip,kou/zulip,kou/zulip,eeshangarg/zulip,synicalsyntax/zulip,zulip/zulip,zulip/zulip,eeshangarg/zulip,rht/zulip,hackerkid/zulip,synicalsyntax/zulip,kou/zulip,zulip/zulip,kou/zulip,kou/zulip,zulip/zulip,punchagan/zulip,eeshangarg/zulip,brainwane/zulip,showell/zulip,brainwane/zulip,kou/zulip,rht/zulip,showell/zulip,punchagan/zulip,hackerkid/zulip,shubhamdhama/zulip,shubhamdhama/zulip,punchagan/zulip,punchagan/zulip,brainwane/zulip,brainwane/zulip,synicalsyntax/zulip,punchagan/zulip,andersk/zulip,shubhamdhama/zulip,zulip/zulip,rht/zulip,showell/zulip,zulip/zulip,synicalsyntax/zulip,andersk/zulip,rht/zulip,andersk/zulip,eeshangarg/zulip,shubhamdhama/zulip,hackerkid/zulip,eeshangarg/zulip,showell/zulip,rht/zulip,brainwane/zulip,timabbott/zulip,synicalsyntax/zulip,timabbott/zulip,showell/zulip,synicalsyntax/zulip,andersk/zulip,shubhamdhama/zulip,andersk/zulip,timabbott/zulip,brainwane/zulip,timabbott/zulip,hackerkid/zulip,showell/zulip,punchagan/zulip,eeshangarg/zulip,shubhamdhama/zulip,andersk/zulip,punchagan/zulip,hackerkid/zulip,rht/zulip,zulip/zulip,synicalsyntax/zulip,shubhamdhama/zulip,hackerkid/zulip,eeshangarg/zulip,hackerkid/zulip,timabbott/zulip,rht/zulip,showell/zulip