chore: update python dependencies + pin pip #766

Job	Run time
Run Tests / Integration tests (microk8s) (katib-controller)	27m 17s
Publish Charm / Generate the Charm Matrix	2s
Run Tests / Lint	13s
Run Tests / Integration tests (microk8s) (katib-db-manager)	26m 33s
Run Tests / Test the bundle	1h 41m 58s
Run Tests / Unit tests (katib-controller)	24s
Run Tests / Unit tests (katib-db-manager)	25s
Run Tests / Check libraries (katib-db-manager) / Check libraries	26s
Run Tests / Check libraries (katib-controller) / Check libraries	26s
Run Tests / Check libraries (katib-controller) / Lint	10s
Run Tests / Check libraries (katib-db-manager) / Lint	9s
Run Tests / Check libraries (katib-ui) / Check libraries	37s
Run Tests / Check libraries (katib-ui) / Lint	10s
Run Tests / Terraform (katib-controller) / Lint / Lint Terraform	8s
Run Tests / Terraform (katib-controller) / Apply / Apply Terraform	5m 8s
Run Tests / Terraform (katib-controller) / Check / Check Terraform	6s
Run Tests / Terraform (katib-db-manager) / Apply / Apply Terraform	5m 12s
Run Tests / Terraform (katib-db-manager) / Check / Check Terraform	4s
Run Tests / Terraform (katib-db-manager) / Lint / Lint Terraform	8s
Run Tests / Terraform (katib-ui) / Apply / Apply Terraform	5m 55s
Run Tests / Terraform (katib-ui) / Check / Check Terraform	6s
Run Tests / Terraform (katib-ui) / Lint / Lint Terraform	6s
Publish Charm / Publish Charm (./charms/katib-ui)	48m 54s
Publish Charm / Publish Charm (./charms/katib-controller)	17m 28s
Publish Charm / Publish Charm (./charms/katib-db-manager)	16m 41s
	4h 18m 46s

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