[PM/AA] Hoist ScopedNoAliasAA's interface into a header and move the
creation function there.

Same basic refactoring as the other alias analyses. Nothing special
required this time around.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245012 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed