[docs] Replace PHPMyAdmin with TablePlus in dev_environmentsetup

Summary:
Removed PHPMyAdmin notes because it broke in macOS 12 (Monterey) for most people.

Added TablePlus because it's being used as an alternative by people.

Test Plan: N/A

Reviewers: atul, palys-swm, ashoat!

Reviewed By: atul

Subscribers: ashoat, palys-swm, Adrian, karol-bisztyga, benschac, boristopalov

Differential Revision: https://phabricator.ashoat.com/D2356