Update infrastructure build suite to be git compatible

[harry-shepherd]

The infrastructure suite at HoT has two issues that need resolving

• It still uses cylc 7 commands
• It is dependent on subversion for the locations and versioning of the suites.

This change will resolve both these issues.

The development branch is https://github.com/harry-shepherd/moci/tree/gitify_infrastructure_suite and the current state of affairs:

• Git parameters are picked up in the launch_suite.sh script
• Build and test run complete using cylc vip
• When using the launch script there is some problem in build_xios task

line 58: export: `905/20b37bfb': not a valid identifier

To do

• Fix the above error
• Set the default version on trunk to be the production coupled models.