cmComputeLinkDepends: upgrade object-only links to usage links
Commit 22da18b9 (Fortran: Restore support for TARGET_OBJECTS providing
modules, 2023-10-27), merged via !8923 (merged) fixed support for gathering
module information from $<TARGET_OBJECTS>-used libraries but forgot to
consider that the link entries do not "upgrade" themselves in case such
a target is also mentioned for usage requirements. Detect and upgrade
such patterns.
Also add a test case.
Manual-backport: release-3.27
Fixes: #25417 (closed)
Backport: release
Edited by Brad King