Fix MPAS-A dycore-only build in version 8.2.0

[kuanchihwang]

When building MPAS-A as a dycore, all physics-related components are disabled. An example scenario of this is for use with CAM/CAM-SIMA.

However, the MPAS-A registry file in version 8.2.0 contains the following regressions, which cause the dycore-only build to break:

• The MPAS-A registry file introduced a new stream, da_state, which unconditionally includes variables that exist only when physics are enabled.
• The MPAS-A registry file unconditionally includes a new registry file from Noah-MP, which is applicable only when physics are enabled.

This PR fixes MPAS-A dycore-only build by guarding the above regions with the DO_PHYSICS macro.

For stand-alone MPAS-A, this PR is an NFC (No Functional Change).

[gdicker1]

I've confirmed that CAM using MPAS v8.2.0[^1] fail to build and give the message

ERROR: Dimension on variable acc_etrani in var_struct diag_physics_noahmp not defined.

After merging these changes, builds can now succeed!

[^1]: requires some code updates that I'll make a PR for in ESCOMP/CAM