src: make `Environment::interrupt_data_` atomic

Otherwise this potentially leads to race conditions when used in a
multi-threaded environment (i.e. when used for its very purpose).

PR-URL: https://github.com/nodejs/node/pull/32523


Reviewed-By: Matheus Marchini <mat@mmarchini.me>
Reviewed-By: James M Snell <jasnell@gmail.com>