[Sanitizer] Refactor symbolization interface: use class instead of several functions. Move some code around to get rid of extra source files

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@190410 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Remove the explicit function prototypes for intercepted functions on Windows

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@190411 91177308-0d34-0410-b5e6-96231b3b80d8