Unity: Don't include sources with HEADER_FILE_ONLY property set
Replaces !4018 (closed)
Fixes: #19946 (closed)
Fixes: #19947 (closed)
Backport: release
A Gitlab security update will be applied on March 29th, between 8am and 10am, EST (UTC-05:00). This site may have intermittent delays during that time.
Replaces !4018 (closed)
Fixes: #19946 (closed)
Fixes: #19947 (closed)
Backport: release