Fix multiversion tests which rely on the renamed internalQueryFrameworkControl knob

Intentionally did not include a method for fixing it, but we renamed the internalQueryForceClassicEngine flag and now the older versions don't recognize the new parameter. The simplest "fix" would be to avoid running multiversion suites in the force-classic-engine variant, but we'd lose a ton of coverage. The better option would be to somehow use this helper to unset the new knob but then also reset to use the old name.