Testing UKCA

Changes in UKCA that touch src/science or src/control/core must be tested with both the UM and LFRic by following the linked pull requests guidance.

For further guidance on testing and working with UKCA, including standard suites and box models see the UKCA trac wiki.

There also exists a small UKCA rose-stem suite, which contains a code styling check. This can launched from the top directory of a local clone by running,

cylc vip -z group=scripts -n <name/of/suite> ./rose-stem