Sync with Mattermost binary changes introduced in v6 (mattermost#470)

* use mmctl to create user

* sync with mattermost binary updates for v6

Only pick user created posts (mattermost#454)

Fix server failing to start (mattermost#419)

Releasing v1.1.0 (mattermost#382)

[MM-26859] Review coordinator config (mattermost#368)

* Review coordinator config

* Remove server request time queries

* Fix JSON

[MM-25970] Enable multi-coordinator deployments (mattermost#327)

* Implement coordinator.Status

* Make Coordinator API safe for concurrent usage

* Add some tests

* Extract API server into its own command

* Restructure api package

* Unexport API struct

* Use mock API server

* Implement coordinator HTTP API

* Add state check to coordinator tests

* Improve error handling for agent API response

* Remove unneeded initializations

* Implement Done state

* Update documentation

* Fix return

* [MM-26459] Split logs for agent and coordinator (mattermost#333)

* Split agent/coordinator logs

* Add godocs

* Use more descriptive names

* Fix more merge conflicts

* Update docs

* Use new ltapi binary during deployment

* Add docs for coordinator using the API server

* Fix spelling errors

* Releasing v0.7.0-alpha (mattermost#336)

Releasing v0.6.0-alpha (mattermost#282)

Releasing v0.5.0-alpha (mattermost#251)

[MM-23900] api/server: accept loadtest.Config and control.Config for …

…agent creation (mattermost#223)

* api/server: accept loadtest.Config and control.Config for agent creation

* api/server: reflect review comments

* docs: reflect changes on API update

* cmd/ltagent: add log initialization to server command

Releasing v0.3.0-alpha (mattermost#211)