MAHI-Alpaka improvements

[kakwok]

This is a collection of topics left out of the initial migration of MAHI to Alpaka #44910
Some details of these topics are included in the HCAL PSG slides.

Technical improvements:

1. Protection against wrong number of digi sample: #44541
2. Use EIGEN_COLUMNS, instead of n arrays.
   • For DigiSoA and MahiConditionsSoA
3. Optimize Stride usage of DigiSoA
4. Related to #45595, remove rechits with chi2<0 from the output rechits

Algorithmic improvements:

1. Missing Method-0 features, containment and time slew : line
2. Related to technical (1), extend Alpaka-MAHI to work in different digi length
3. Non-deterministic behavior for TS with same energy: line

[cmsbuild]

cms-bot internal usage

[cmsbuild]

A new Issue was created by @kakwok.

@Dr15Jones, @antoniovilela, @makortel, @mandrenguyen, @rappoccio, @sextonkennedy, @smuzaffar can you please review it and eventually sign/assign? Thanks.

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[makortel]

assign heterogeneous, reconstruction

FYI @cms-sw/hcal-dpg-l2

[cmsbuild]

New categories assigned: heterogeneous,reconstruction

@fwyzard,@jfernan2,@makortel,@mandrenguyen you have been requested to review this Pull request/Issue and eventually sign? Thanks

[jfernan2]

FYI @abdoulline @igv4321 as HCAL reco contacts