[NFC] Improve deserialization errors for wrong record kind

There are a bunch of places where we expect to find a record with a particular record ID/kind in the decls_block and have to bail out if we see something we don’t expect. Add an `InvalidRecordKindError` we can use in this situation to produce a useful error message and adopt it in various places.

This change also makes deserialization errors print the path to the invalid file.

lib/Serialization/ModuleFileSharedCore.cpp

@@ -585,6 +585,8 @@ void ModuleFileSharedCore::outputDiagnosticInfo(llvm::raw_ostream &os) const {
       << "'";
   if (Bits.IsAllowModuleWithCompilerErrorsEnabled)
     os << " (built with -experimental-allow-module-with-compiler-errors)";
+  if (ModuleInputBuffer)
+    os << " at '" << ModuleInputBuffer->getBufferIdentifier() << "'";
 }
 
 ModuleFileSharedCore::~ModuleFileSharedCore() { }