chore: remove long-deprecated timer globals (jestjs#7285)

chore: remove long-deprecated timer globals (jestjs#7285)

Implements a mapper option (jestjs#6940)

* Implements a mapper option

* Updates changelog

* Fixes linting

* Makes the mapper optional typewise

* Fixes tests

* Adds the plumbing to set the value from the options

* Updates the error message

* Linting

* Fixes things

Implements a mapper option (jestjs#6940)

* Implements a mapper option

* Updates changelog

* Fixes linting

* Makes the mapper optional typewise

* Fixes tests

* Adds the plumbing to set the value from the options

* Updates the error message

* Linting

* Fixes things

Pre-release 24.0.0-alpha.0

Release v23.6.0