Add basic threadAccess analysis #15261

Job	Run time
regression (ubuntu-latest, ocaml-variants.4.14.2+options,ocaml-option-flambda)	8m 8s
regression (macos-latest, ocaml-variants.4.14.2+options,ocaml-option-flambda)	13m 53s
extraction	0s
	22m 1s

Provide feedback