Don't link against kokkostools in tests unconditionally

[masterleinad]

Tests would normally just use environment variables to load the respective tool. In any case, we shouldn't link to kokkostools unconditionally. Tests that set the respective hooks explicitly would not use the environment variable KOKKOS_TOOLS_LIBS and only link against kokkostools that can either happen explicitly or via another argument to kp_add_executable_and_test.

[vlkale]

Thanks @masterleinad

Imposing kokkostools (monolithic) library requirement only for those Kokkos Tools tests needing it will make it easier for users to run the Kokkos Tools tests on their own platforms. I think none of the tests in develop need more than the individual (not monolithic) library for KOKKOS_TOOLS_LIBS.