upload: Refactor out realm_avatar_and_logo_path function.
upload: Refactor out realm_avatar_and_logo_path function.

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