scripts: Split up chasssis.{h,cpp} #9453

Job	Run time
code-format	28s
check_vvl	1m 0s
androidOnLinux	12m 7s
android (arm64-v8a, ON, c++_shared)	10m 40s
chromium (target_os="linux" target_cpu="x64")	7m 54s
Ubuntu Backcompat	9m 58s
android (armeabi-v7a, OFF, c++_static)	4m 47s
linux (address sanitizer, debug, robinhood ON )	24m 30s
chromium (target_os="android" target_cpu="arm64")	11m 4s
linux (address sanitizer, release, robinhood ON )	24m 45s
mingw	12m 19s
linux (thread sanitizer, release, robinhood ON )	24m 21s
windows (amd64)	15m 13s
linux (address sanitizer, release, robinhood OFF )	23m 50s
windows (amd64_x86)	9m 57s
androidUpload	0s
windowsUpload	0s
iOS	4m 16s
linux Upload	1s
	3h 17m 10s

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