Add more rule exceptions

I'm unsure why these don't show up locally on the same Pyright version.
They were flagged by CI so I'm adding them to the list from the previous
commit.

Author: victorlin

pyrightconfig.json

@@ -15,13 +15,15 @@
   "reportCallIssue": false,
   "reportGeneralTypeIssues": false,
   "reportIncompatibleMethodOverride": false,
+  "reportMissingImports": false,
   "reportMissingModuleSource": false,
   "reportOperatorIssue": false,
   "reportOptionalIterable": false,
   "reportOptionalMemberAccess": false,
   "reportOptionalOperand": false,
   "reportOptionalSubscript": false,
   "reportPossiblyUnboundVariable": false,
+  "reportPrivateImportUsage": false,
   "reportSelfClsParameterName": false,
   "reportUndefinedVariable": false,
   "reportUnusedExpression": false,