chore(deps): update terraform juju to ~> 0.15.0 #741

Job	Run time
Publish Charm / Generate the Charm Matrix	3s
Run Tests / Lint	12s
Run Tests / Integration tests (microk8s) (katib-controller)	23m 26s
Run Tests / Integration tests (microk8s) (katib-db-manager)	23m 5s
Run Tests / Test the bundle	59m 26s
Run Tests / Unit tests (katib-controller)	19s
Run Tests / Unit tests (katib-db-manager)	14s
Run Tests / Check libraries (katib-controller) / Check libraries	28s
Run Tests / Check libraries (katib-controller) / Lint	10s
Run Tests / Check libraries (katib-db-manager) / Check libraries	27s
Run Tests / Check libraries (katib-db-manager) / Lint	8s
Run Tests / Check libraries (katib-ui) / Check libraries	28s
Run Tests / Check libraries (katib-ui) / Lint	7s
Run Tests / Terraform (katib-controller) / Apply / Apply Terraform	5m 24s
Run Tests / Terraform (katib-controller) / Check / Check Terraform	6s
Run Tests / Terraform (katib-controller) / Lint / Lint Terraform	9s
Run Tests / Terraform (katib-db-manager) / Apply / Apply Terraform	5m 2s
Run Tests / Terraform (katib-db-manager) / Check / Check Terraform	8s
Run Tests / Terraform (katib-ui) / Apply / Apply Terraform	4m 56s
Run Tests / Terraform (katib-db-manager) / Lint / Lint Terraform	9s
Run Tests / Terraform (katib-ui) / Check / Check Terraform	11s
Run Tests / Terraform (katib-ui) / Lint / Lint Terraform	6s
Publish Charm / Publish Charm (./charms/katib-ui)	21m 0s
Publish Charm / Publish Charm (./charms/katib-controller)	14m 7s
Publish Charm / Publish Charm (./charms/katib-db-manager)	13m 27s
	2h 53m 18s

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