Fix bug in expMSSA control flags

[The9Cat]

The issue

The expMSSA header defines totVar and totPow as boolean but uses them as doubles to compute the norm. Not sure how this is legal code? But that's how it appears.

The fix

1. Make totVar and totPow doubles.
2. Add varFlag and powFlag as boolean class data set by the totVar and totPow YAM configuration flag
3. Added both flags and values to the HDF5 cache files
4. Added some verbose log output for testing to verify that the logic is working as expected.

Notes

While this is formally a big, I think, I'm basing the PR on devel, anticipating an upcoming merge to main

[Copilot]

Pull Request Overview

This pull request fixes a bug in the expMSSA class where totVar and totPow were incorrectly declared as boolean types but used as double values for norm computations. The fix separates the control flags from the computed values and improves cache file handling.

• Converts totVar and totPow from boolean to double types for norm calculations
• Introduces new boolean flags varFlag and powFlag to control the normalization behavior
• Adds cache file support for the new flags and improves HDF5 attribute handling

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
include/SLGridMP2.H	Adds static member variables for grid construction heuristics
exputil/SLGridMP2.cc	Implements adaptive grid boundaries and enhanced diagnostic output
expui/expMSSA.cc	Fixes boolean/double type confusion and adds flag handling
expui/expMSSA.H	Updates class definition with separate flag and value variables

[michael-petersen]

I can confirm this is all behaving as expected; still surprised the compiler didn't catch this, but seems that we are good now.