[lib] moved modal-provider.react from web to lib

Summary:
moved modal-provider.react from web to lib. Also needed to change all the imports calls of modal-provider.react to use lib instead of web

Depends on D5370
Linear Task: ENG-2038

Test Plan:
Please watch the video to see that there are no visual or performance regressions witht the migration of modal-provider.react from web to lib. Also everything compiles successfully which is a
good indication that all the imports have been correclty refactored

Reviewers: atul, abosh, rohan, przemek

Reviewed By: atul, przemek

Subscribers: ashoat, tomek, atul, abosh

Differential Revision: https://phab.comm.dev/D5372