Update CIME submodule

... to f903115718ebc30669ce557f511abaef231a1d88

Fixes:
1) Several fixes/changes to containerized CI. No impact to E3SM
2) fix an issue with single component runs which do use mediator
3) Fix ERI test type: need to make sure ref2 run dir exists
4) Fixes config ignoring paths containing "tests"
5) More robust approach to waiting for many threads, fixes a bug where
   archiving threads block test reporting.
6) The xmlchange tool should not raise an exception when a diff is detected.

Changes:
1) New feature: long grid names
2) Update documentation
3) Refactors how/when rebuilds are required. Reduce scenarios in which a full rebuild is required
4) Remove reference to cice5 and ww3dev, they are no longer used

[BFB]