src: disable unfixable MSVC warnings

The following warnings are disabled:
- C4065 in node_revert.h: there are no security reversions on the master
  branch.
- C4003 in base64-inl.h: a macro is used four times, only once without
  parameters.

PR-URL: https://github.com/nodejs/node/pull/37334


Reviewed-By: James M Snell <jasnell@gmail.com>