In commit 7351d590 (cmTarget: Add a way to represent imported shared
library stubs, 2023-07-17, v3.28.0-rc1~344^2) we accidentally stopped
passing the SONAME of a non-imported SHARED library to our runtime
search path ordering logic.  Unfortunately I have not found a way to add
a test case for this, but it at least shouldn't regress existing tests
or those added by that commit.