add flexible configurations for WW3

[DeniseWorthen]

Description

Currently different configurations of WW3 in UWM are specified with a specific switch file. Currently used are switch_meshcap, switch_meshcap_pdlib and switch_multi_esmf. Each additional test configuration requires a new switch file. It would more flexible if the options which vary between configurations could be "added" to a default switch file at compile time.

Solution

Modify CMakeLists.txt at both the WW3 and UWM levels to accommodate setting optional WW3 configurations via rt.conf.

Alternatives

Continue to add nearly identical versions of switch files for use in UWM

Related to

• needed by Add regression testing for wave-sea ice coupling #2072