Rename sandbox_getaddrinfo() functions.

From my branch for #26524 (moved):

+// XXXX rename these.  They are named as though they were sandbox-only,
+// XXXX but in fact they're the only allowed entry point to getaddrinfo.
+// XXXX They don't invoke the sandbox code; they only have an internal cache.

These functions should be called something like tor_getaddrinfo...(), or tor_getaddrinfo_cache...()