[RemoteInspection] Add a hook to process addresses before converting

them to hex strings when creating anonymous context descriptors. This
aims to solve a problem when LLDB reads reflection metadata directly
from local binary files instead of downloading them from in-process
memory.

LLDB's MemoryReader implements this to convert the file address into
an in-process address, so mangled names created from instance metadata
can be matched with the field info data read from the local files.

rdar://152743797
(cherry picked from commit 540df142d7)

include/swift/Remote/MemoryReader.h

@@ -150,6 +150,13 @@ public:
     return RemoteAbsolutePointer("", readValue);
   }
 
+  /// Performs the inverse operation of \ref resolvePointer.
+  /// A use-case for this is to turn file addresses into in-process addresses.
+  virtual std::optional<RemoteAddress>
+  resolveRemoteAddress(RemoteAddress address) const {
+    return std::nullopt;
+  }
+
   virtual std::optional<RemoteAbsolutePointer>
   resolvePointerAsSymbol(RemoteAddress address) {
     return std::nullopt;