Runtime specific API in `utils` package: `process`

[lforst]

We cannot depend on any runtime specific implementation in the @sentry/utils package.

In the ANR implementation, we depend on the process object which is not available in all runtimes so we need to move this implementation into the @sentry/node package. This is likely a breaking change but for a bugfix that would warrant this.

sentry-javascript/packages/utils/src/anr.ts

Line 21 in c9aaf8b

let lastPoll = process.hrtime();