[flang][driver] Add debug measure-parse-tree and pre-fir-tree options

Add the following options:
* -fdebug-measure-parse-tree
* -fdebug-pre-fir-tree

Summary of changes:
- Add 2 new frontend actions: DebugMeasureParseTreeAction and DebugPreFIRTreeAction
- Add MeasurementVisitor to FrontendActions.h
- Make reportFatalSemanticErrors return true if there are any fatal errors
- Port most of the `-fdebug-pre-fir-tree` tests to use the new driver if built, otherwise use f18.

Differential Revision: https://reviews.llvm.org/D96884