Fix legacy CMake targets

[adayton1]

Apparently there are issues when trying to export targets twice even if they end up with different names. So now we try creating an INTERFACE library called umpire and link it to umpire::umpire. Note that the "umpire" target gains properties only transitively, not on the target itself.

Also fixes creation of umpire_device target.

CMake Error: install(EXPORT "chai-targets" ...) includes target "chai" which requires target "umpire" that is not in this export set, but in multiple other export sets: lib/cmake/umpire/umpire-targets.cmake, lib/cmake/umpire/umpire-non-namespaced-targets.cmake.
 
An exported target cannot depend upon another target which is exported multiple times. Consider consolidating the exports of the "umpire" target to a single export.

See #1102, #1101, #1100, #1083, #1067

[kab163]

@adayton1 - Did this work for your use case? I want to double check before we merge these changes.

[adayton1]

It's still failing in some cases - just trying to work through them.