Sync sub-repos for PR to main

Sub-repos src/icebergs, src/SIS2, and src/MOM6 were updated to dev/gfdl without any changes to doc strings or results.
In preparation for PR to MOM6/main.

src/MOM6:

NOAA_GFDL/MOM6@6272bbcdc Testing: Correct perf parsing of C++ output
NOAA_GFDL/MOM6@e25388369 Merge branch 'main' into dev/gfdl
NOAA_GFDL/MOM6@0c790f2dc SAL: Explicitly allocate sht variable in SAL_CS
NOAA_GFDL/MOM6@129e1bda0 Merge pull request #1623 from jiandewang/DEV-EMC-candidate-20240425
NOAA_GFDL/MOM6@a89d085bf Merge pull request #12 from marshallward/db_type_fix
NOAA_GFDL/MOM6@aac5bb846 Replace db array default values with real literals
NOAA_GFDL/MOM6@0730606b8 Merge pull request #132 from jiandewang/feature/update-to-main-20240401
NOAA_GFDL/MOM6@6d0150d6c Merge remote-tracking branch 'MAIN/main' into feature/update-to-main-20240401
NOAA_GFDL/MOM6@ab7bd14d2 Merge pull request #130 from marshallward/emc_fix_warn
NOAA_GFDL/MOM6@dc248836f Error cleanup (Intel Fortran)
NOAA_GFDL/MOM6@10521a921 Merge pull request #127 from jiandewang/feature/update-to-main-20240228

src/SIS2:

src/icebergs:

NOAA_GFDL/icebergs@729b231 Merge pull request #69 from alex-huth/iOM4_with_bergs
NOAA_GFDL/icebergs@4abac9e fixed heat budget
NOAA_GFDL/icebergs@e8f794b Merge pull request #68 from alex-huth/iOM4_with_bergs
NOAA_GFDL/icebergs@9d77ef1 Several miscellaneous updates
NOAA_GFDL/icebergs@89cf3e6 Use masked-out SST to determine units of SST
NOAA_GFDL/icebergs@9c8266d fixed noted units of calving

NOAA-GFDL / MOM6-examples