Fortran: Restore support for TARGET_OBJECTS providing modules

Continue b665966933 (cmComputeLinkInformation: track OBJECT library
dependencies, 2023-07-22) which added explicitly listed `OBJECT`
libraries to the list of targets which the collator needs to consider.
Now also consider targets which provide objects directly to the target
via a `$<TARGET_OBJECT>` source lists.

Also add tests which use target objects directly and through an
`INTERFACE` library with target objects in its own sources.

Fixes: #25365
9 files changed