Add bad json input tests found by OSS-Fuzz #829

Job	Run time
codegen	13s
chromium	1m 25s
linux-32-no-asm	2m 30s
linux-32 (Debug)	2m 18s
linux (gcc, g++, Debug, ubuntu-20.04)	3m 20s
linux-no-asm	4m 25s
linux-32 (Release)	2m 31s
linux (gcc, g++, Debug, ubuntu-22.04)	6h 0m 13s
linux (gcc, g++, Release, ubuntu-20.04)	6m 54s
linux (gcc, g++, Release, ubuntu-22.04)	6h 0m 13s
linux (clang, clang++, Debug, ubuntu-20.04)	2m 48s
linux (clang, clang++, Debug, ubuntu-22.04)	6h 0m 17s
linux (clang, clang++, Release, ubuntu-20.04)	4m 23s
linux (clang, clang++, Release, ubuntu-22.04)	6h 0m 13s
mingw-no-asm-explicit	0s
mingw-no-asm	0s
mingw	0s
mingw-use-gas	0s
windows_clang	0s
windows_vs	0s
windows_vs-no-asm	0s
${{ matrix.CMAKE_SYSTEM_NAME }}	0s
mac	0s
Universal Binary Testing (STATIC ${{ matrix.static }}) w/ ${{ matrix.generator }}	0s
	1d 0h 31m 43s

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