JIT: workaround for unreliable change detection in fgReorderBlocks (#48516)
This method costs trees, which can in turn modify the IR by swapping operands. As a result the bool value returned doesn't properly reflect whether any changes happened. This impacts proper reporting phase status by `optOptimizeLayout'. Since phase status just gates post-phase dumps and checks, we'll just claim this phase always modifies IR. Add similar workaround for `optInvertLoops`. Fixes #48494. Fixes #48495.
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