Add install/activate/unactivate plugin console commands

[cedric-anne]

Q	A
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no
Tests pass?	yes
Fixed tickets	-

New commands to be able to install and activate plugins from CLI, in order to make insctallation scription easier.

[cedric-anne]

For plugins using Migration class, it is not possible yet to have a clean output. Indeed, migration class flushes messages instantly and gives no ability to control this.
Example with fusioninventory plugin:

A solution could be to rework migration in 3 classes:

• a AbstractMigration class, that handles logic part of migration,
• a UiMigration class extending AbstractMigration, that handle displaying of messages on currentUI,
• a CliMigration class extending AbstractMigration, that handle displaying of messages on currentUI.
  Then, to enfore usage of the UiMigration or the CliMigration class depending on context, GLPI init process could declare a class alias (class_alias(\UiMigration::class, 'Migration'); or class_alias(\CliMigration::class, 'Migration');)

This may looks as a hack, but, unless I miss something, it will prevent any breaking change for existing code.

[cedric-anne]

I merged CliMigration into Migration and adapt output to context.
Now output is clean:

[cedric-anne]

@flegastelois I just updated to last release of symfony/console. No the autocomplete feature should work for multiple choices, according to symfony/symfony#31377.