[TFLite] Fix FlatBuffers package name in installed CMake files
@gbaned Is the approval of @NancyAngels enough to move it forward internally? > @gbaned Is the approval of @NancyAngels enough to move it forward internally?

Hi @daniel-lang It required Googler approval, I have requested @qukhan to review. Thank you!
Similiar to #58677, the capitalization of FlatBuffers needs to match. Otherwise using TFLite via find_package() will fail to find FlatBuffers.