Set `payu_minimum_version`

[dougiesquire]

Configurations that use model-tools/fre-nctools/2024.05-1 (1deg, not _bgc) require this change in Payu for collation to succeed and thus require Payu >=1.2.1.

We should set the payu_minimum_version accordingly in the config.yaml

[aidanheerdegen]

Payu version 1.2.1 is now deployed on gadi

ACCESS-NRI/model-release-condaenv#51

[dougiesquire]

This has now been done in dev-1deg_jra55_iaf and dev-1deg_jra55_ryf