LightGBM

[R-package] CMake fixes to support MSVC (#2963)

* [R-package] CMake fixes to support MSVC

* simplifications

* Apply suggestions from code review

Co-Authored-By: Nikita Titov <nekit94-08@mail.ru>

* removed MSVC_RUNTIME_LIBRARY property

* fixed FindLibR search for LIBR_CORE_LIBRARY

* Update CMakeLists.txt

Co-Authored-By: Nikita Titov <nekit94-08@mail.ru>

* made R.lib linking more explicit

* add R_DOT_LIB_FILE to cache

* changed R.lib CMake name

* fix placementt tof R_MSVC_CORE_LIBRARY

* empty commit

* change MSVC library name

* one more name change

Co-authored-by: Nikita Titov <nekit94-08@mail.ru>