feat: add Terraform module for dex-auth #467

Job	Run time
Run Tests / Lint	9s
Run Tests / Lint	9s
Run Tests / Unit	17s
Run Tests / Unit	17s
Publish Charm / Generate the Charm Matrix	4s
Publish Charm / Generate the Charm Matrix	4s
Run Tests / Integration	25m 26s
Run Tests / Integration	26m 12s
Run Tests / Check libraries / Check libraries	1m 9s
Run Tests / Check libraries / Check libraries	1m 9s
Run Tests / Check libraries / Lint	9s
Run Tests / Check libraries / Lint	9s
Run Tests / Terraform / Lint Terraform	8s
Run Tests / Terraform / Lint Terraform	8s
Run Tests / Terraform / Apply / Apply Terraform	9m 38s
Run Tests / Terraform / Apply / Apply Terraform	9m 38s
Run Tests / Terraform / Check / Check Terraform	5s
Run Tests / Terraform / Check / Check Terraform	5s
Publish Charm / Publish Charm (./)	15m 13s
Publish Charm / Publish Charm (./)	13m 59s
	1h 44m 8s

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