pleroma_ctl: Run mix tasks using rpc instead of eval

See merge request !1297

This patch changes pleroma_ctl to call into a running instance instead of spinning up
a new one for mix task execution. This significantly decreases the time needed
for mix task execution (on my machine for `pleroma_ctl user set rin --no-admin`
the difference is 0.2s vs 4.2s) and allows mix tasks to affect the
instance context, for example, this allows to clear the cache after user
deletion

Removing test errors

See merge request !1296

Sanitize HTML in ReportView

Closes #990

See merge request !1293

removed some ownership sandbox error

[#570] add user:notification stream

See merge request !1274

version generation

Closes #991

See merge request !1291

fix for new instances

See merge request !1294

Closes #990

MastodonAPI Controller: Band-Aid double vote problem.

See merge request !1275

Update Phoenix

See merge request !1290

[#963] No redirect on OOB OAuth authorize request with existing authorization

See merge request !1276

and this leftover artifact breaks compiling now.

Mastodon API: Return the token needed for the chat.

See merge request !1292

AccountView: Add user background.

See merge request !1280

Feature/905 dynamic configuration in sql

Closes #905

See merge request !1195

we can't change module attributes and endpoint settings in runtime

Fix rate limit test

See merge request !1289

Fix hashtags being picked up by rich media parser

Closes #989

See merge request !1288

[#948] /api/v1/account_search added optional parameters (limit, offset, following)

See merge request !1270

Closes #989

Add copyright info to containment.ex

See merge request pleroma/pleroma!1286