provision: Add provision support for KDE Neon 20.04.
provision: Add provision support for KDE Neon 20.04.

PostgreSQL 12 is used for Neon 20.04, which is a fork of Ubuntu 20.04.

zulip/zulip,eeshangarg/zulip,rht/zulip,andersk/zulip,rht/zulip,hackerkid/zulip,kou/zulip,eeshangarg/zulip,kou/zulip,rht/zulip,rht/zulip,andersk/zulip,andersk/zulip,rht/zulip,zulip/zulip,punchagan/zulip,punchagan/zulip,eeshangarg/zulip,eeshangarg/zulip,andersk/zulip,punchagan/zulip,hackerkid/zulip,punchagan/zulip,zulip/zulip,eeshangarg/zulip,hackerkid/zulip,andersk/zulip,punchagan/zulip,kou/zulip,hackerkid/zulip,zulip/zulip,hackerkid/zulip,zulip/zulip,punchagan/zulip,kou/zulip,zulip/zulip,eeshangarg/zulip,kou/zulip,punchagan/zulip,rht/zulip,andersk/zulip,kou/zulip,hackerkid/zulip,kou/zulip,rht/zulip,andersk/zulip,zulip/zulip,hackerkid/zulip,eeshangarg/zulip