Add preconditoner routines to TimeIntegrator with SUNDIALS support

[balos1]

Summary

This PR adds set_preconditioner and set_fast_preconditioner routines to the BaseIntegrator class which allow for preconditioner setup and solve callbacks to be attached and used with SUNDIALS implicit time integrators.

Additional background

Checklist

The proposed changes:

• fix a bug or incorrect behavior in AMReX
• add new capabilities to AMReX
• changes answers in the test suite to more than roundoff level
• are likely to significantly affect the results of downstream AMReX users
• include documentation in the code and/or rst files, if appropriate

CC @gardner48

Tutorial (PR soon).

[ajnonaka]

Thanks @balos1 ! I will create a tutorial with a simple custom preconditioner to test this.

[balos1]

Thanks @balos1 ! I will create a tutorial with a simple custom preconditioner to test this.

https://github.com/sundials-codes/amrex-tutorials/tree/advdiff_sundials_hypreprecon/ExampleCodes/SUNDIALS/AdvDiff-MLMGPrecon