[clang] [analyzer] Modernize, improve and promote chroot checker (PR #117791)

[via cfe-commits]

vabridgers wrote:

> @vabridgers Please avoid force pushes. 
I understand and will abide by this request. I had tried rebasing and pushing at one time and found I needed to force a push upload my newest changes and thought that was the default flow. 


https://github.com/llvm/llvm-project/pull/117791