Environment variable 'AYON_DEFAULT_SETTINGS_VARIANT' is not respected

[iLLiCiTiT]

Current Behavior:

Right now AYON launcher does not respect AYON_DEFAULT_SETTINGS_VARIANT environment variable which causes issues when launching on farm.

Expected Behavior:

Value of AYON_DEFAULT_SETTINGS_VARIANT environment variable should be considered in startup logic.

Consequences

This causes that jobs on farm that sould use staging settings and addons are using production settings and addons instead.