[PDB] Fix missing consumeError which raise error with asserts enabled (llvm#116480)

As mentioned in the title, the missing `consumeError` triggers assertions.

Author: romainthomas

llvm/lib/DebugInfo/PDB/Native/SymbolCache.cpp

@@ -388,12 +388,16 @@ SymbolCache::findPublicSymbolBySectOffset(uint32_t Sect, uint32_t Offset) {
     return getSymbolById(Iter->second);
 
   auto Publics = Session.getPDBFile().getPDBPublicsStream();
-  if (!Publics)
+  if (!Publics) {
+    consumeError(Publics.takeError());
     return nullptr;
+  }
 
   auto ExpectedSyms = Session.getPDBFile().getPDBSymbolStream();
-  if (!ExpectedSyms)
+  if (!ExpectedSyms) {
+    consumeError(ExpectedSyms.takeError());
     return nullptr;
+  }
   BinaryStreamRef SymStream =
       ExpectedSyms->getSymbolArray().getUnderlyingStream();