Configuration for some providers was given in the sub-field `provider_settings`
combining the settings of several providers. Pydantic does not understand
this very well and the configuration became cumbersome, especially in EOSdash.
All provider settings from the `provider-settings` sub-field are now lifted
to the top level field of the configuration.
The changes are automatically migrated in the configuration.
Signed-off-by: Bobby Noelte <b0661n0e17e@gmail.com>