feat(asg): Add fine-grained options for schedule_config scale_in and scale_out

[baolsen]

Description

Closes #585

Migrations required

NO

Verification

None. I've locally tested the "try" logic in terraform console to ensure it works with / without the overrides.

[kayman-mk]

Nice! Have never noticed this schedule_config before.

[kayman-mk]

Could you please run a terraform apply with a dummy example? Just to make sure that the module is still deployable. Code looks good.

[npalm]

Can you explain what the change is solving. It seems only defaults are changed which can be done by setting a variable to your need.

[baolsen]

Thanks for the feedback @npalm , the "actual" change is in main.tf and addresses the issue #585

Specifically, when the values for min_size, max_size and desired_capacity need to be different from one another - current functionality only allows setting them all to the same value (specified by xxx_count).