Update hydraulic failure mortality cflux history name to match NGEET repo

[JessicaNeedham]

Description:

Hydraulic failure mortality carbon flux has a different name in NorESM-FATES than on the NGEET repo which keeps tripping me up.

See NGEET: https://github.com/NGEET/fates/blob/55ec6c7768061148fc107a0810d3690763d85320/main/FatesHistoryInterfaceMod.F90#L7791

And NorESM-FATES:

fates/main/FatesHistoryInterfaceMod.F90

Line 7805 in 82e7c0b

call this%set_history_var(vname='FATES_MORTALITY_HYDRAULIC_CFLUX_PF', units='kg m-2 s-1', &

This PR changes NorESM side to match NGEET.

Collaborators:

Expectation of Answer Changes:

Not answer changing but will require possible scripting updates if this history variable is being manually added to runs.

Checklist:

• My change requires a change to the documentation.
• I have updated the in-code documentation .AND. (the technical note .OR. the wiki) accordingly.
• I have read the CONTRIBUTING document.
• FATES PASS/FAIL regression tests were run
• If answers were expected to change, evaluation was performed and provided

Test Results:

Not tested.