Release iOS and Android docs

[theletterf]

Continues #228

Actions

• Import iOS and Android documentation Import iOS and Android documentation #244
• Add Android and iOS redirects Edit Android and iOS links, redirects docs-content#1455
• Remove iOS reference docs Remove reference docs apm-agent-ios#272
• Remove Android reference docs Remove reference docs apm-agent-android#498
• Remove Android and iOS nav items Remove Android and iOS nav items docs-builder#1304

Bonus point:

• Add glob patterns to redirections [Experiment] Add glob redirects docs-builder#1278

[theletterf]

+CC @colleenmcginnis @LikeTheSalad @AlexanderWert @cotti This is currently blocked, waiting for the web team to fix redirects.