export(TARGETS): Restore EXPORT_LINK_INTERFACE_LIBRARIES

Refactoring in commit 998495cb49 (cmExportCommand: Port to
cmSubcommandTable, 2025-07-15) accidentally removed support for the
`EXPORT_LINK_INTERFACE_LIBRARIES` argument.  Restore it with a test.

Fixes: #27302

Source/cmExportCommand.cxx

@@ -72,7 +72,8 @@ static bool HandleTargetsMode(std::vector<std::string> const& args,
       .Bind("CXX_MODULES_DIRECTORY"_s, &Arguments::CxxModulesDirectory)
       .Bind("TARGETS"_s, &Arguments::Targets)
       .Bind("APPEND"_s, &Arguments::Append)
-      .Bind("ANDROID_MK"_s, &Arguments::AndroidMKFile);
+      .Bind("ANDROID_MK"_s, &Arguments::AndroidMKFile)
+      .Bind("EXPORT_LINK_INTERFACE_LIBRARIES"_s, &Arguments::ExportOld);
 
   std::vector<std::string> unknownArgs;
   Arguments arguments = parser.Parse(args, &unknownArgs);

Tests/RunCMake/export/ExportLinkInterfaces.cmake

@@ -0,0 +1,6 @@
+enable_language(CXX)
+add_library(foo empty.cpp)
+
+export(TARGETS foo
+  EXPORT_LINK_INTERFACE_LIBRARIES
+)

Tests/RunCMake/export/RunCMakeTest.cmake

@@ -13,6 +13,7 @@ run_cmake(ForbiddenToExportInterfaceProperties)
 run_cmake(ForbiddenToExportImportedProperties)
 run_cmake(ForbiddenToExportPropertyWithGenExp)
 run_cmake(ExportPropertiesUndefined)
+run_cmake(ExportLinkInterfaces)
 run_cmake(DependOnNotExport)
 run_cmake(DependOnDoubleExport)
 run_cmake(DependOnDifferentSetExport)