[APIGen] Pass previous-module-installname-map file to APIGen (#88288)
For `@_originallyDefinedIn` declarations, we should be consistent with
TBDGen to emit `$ld$previous` symbols instead of a huge number of
`$ld$hide` symbols, when a previous-module-installname-map file is given
from TBDGen options.
`APIGenRequest` was constructing a new and empty set of `TBDGenOptions`
so the map file was missing when generating API descriptor. Pass the
actual options from the invocation.