[rfhaque]

Description

This PR changes the Laghos Spack config to use the latest raja (v2026.07.1), camp (v2026.07.2), and umpire (v2026.07.2) releases.

• v3.2 Release Candidate Laghos 3.2 release candidate CEED/Laghos#219
• Release 3.2
• update benchpark to use v3.2 in experiment, and package to have it as default
• There was a comment in the package that 3.2 (former ats-6) must use MFEM's HIP-aware compiler command for ROCm builds. What does this mean, and is it still the case?
• Upstream laghos spack package Upstream Laghos package.py - #7385 spack/spack-packages#7468
• Laghos build instructions Laghos build instructions benchmarks#127
• Remove laghos spack package from benchpark

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.96%. Comparing base (b699f85) to head (7be67fa).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1612   +/-   ##
========================================
  Coverage    82.96%   82.96%           
========================================
  Files          128      128           
  Lines         8721     8721           
  Branches      1261     1261           
========================================
  Hits          7235     7235           
  Misses        1323     1323           
  Partials       163      163           

Files with missing lines	Coverage Δ
experiments/laghos/experiment.py	40.83% <ø> (ø)

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