ctsm5.4.040: Update clm6 paramfiles and add a new one for hillslope hydrology

[slevis-lmwg]

Description of changes

Updating the clm6 paramfiles.

Specific notes

Contributors other than yourself, if any:
@wwieder @linniahawkins

CTSM issues resolved or otherwise addressed, if any:
Resolves #3659

If answers are expected to change, describe (delete this line otherwise):
Answers change from the baseline due to changing param values in the CLM6 paramfiles.

Any user interface changes (namelist or namelist defaults changes)?
Changing two paramfiles and adding a new one for hillslope hydrology in namelist_defaults.

Testing planned or performed, if any:

• ./build-namelist_test.pl OK
• derecho ./run_sys_tests -s aux_clm -c ctsm5.4.039 -g ctsm5.4.040
• izumi ./run_sys_tests -s aux_clm -c ctsm5.4.039 -g ctsm5.4.040

Requirements before merge:

• I have followed the CTSM contribution guidelines.
• The code in this PR branch builds with no errors.
• The code in this PR branch runs with no errors. Briefly describe tested configuration(s): aux_clm
• This either (a) does not change answers, (b) it only changes answers at roundoff level, or (c) I have performed a scientific evaluation of the answer changes. Answer: (c) Simulations wetlands.n03.ctsm5.4.029_f09noCrop_flat_164_[AD, SASU, pSASU] NCAR/LMWG_dev#164 and wetlands.n03.ctsm5.4.029_f09noCrop_HH_165_[AD, SASU, pSASU] NCAR/LMWG_dev#167
• I have reviewed relevant parts of the CLM documentation Tech Note or User's Guide to determine if anything needs to be changed or added. If it does, describe:
• This PR either (a) does not create a need to update the documentation or (b) includes required documentation updates (see guidelines for contributing documentation). Answer: (a)
• Update ChangeLog: Mention issues lmwg_dev 164 and 167 as the test runs, we are not pointing to new IC in the defaults because of various non-standard things in these runs

[slevis-lmwg]

Ok, now ready for review, and we can first discuss if you prefer @wwieder.

[ekluzek]

The basic functionality is what needs to be done.

I'm hitting approve so you don't have to track me down. But, the one suggested change I gjive is something that I think should be done. And I think it's straightforward enough to do. Otherwise, we can do it later.

And there's a more subtle thing that came to my mind that will need more thought and some discussion to figure out, so should be done later.