Since commit c16acd35b3 (GenEx: Add support for custom transitive link
properties, 2024-05-09, v3.30.0-rc1~82^2) evaluation of
`TRANSITIVE_LINK_PROPERTIES` by `install(EXPORT)` enables discovery of
missing dependencies on INTERFACE libraries that we did not previously
diagnose. This regressed existing projects that relied on such
non-diagnosis. Although commit 2fc9e482a9 (Evaluation of
TRANSITIVE_LINK_PROPERTIES isn't considered a usage, 2024-07-05) fixed
this, it also made a significant change to the `UseTo` infrastructure
that may have other subtle effects. Replace the fix with an approach
that explicitly models suppression of the relevant diagnostics.
Fixes: #26108
Teach the `$<TARGET_PROPERTY:...>` generator expression to check for a
new `TRANSITIVE_LINK_PROPERTIES` property in the target's link
closure to enable transitive evaluation of named properties through
the link closure, including entries guarded by `$<LINK_ONLY:...>`.
Fixes: #20416
Teach the `$<TARGET_PROPERTY:...>` generator expression to check for a
new `TRANSITIVE_COMPILE_PROPERTIES` property in the target's link
closure to enable transitive evaluation of named properties through
the link closure, excluding entries guarded by `$<LINK_ONLY:...>`.
Issue: #20416
