Update gaea-c6 Intel modulefiles to support spack-stack@1.9.2 oneapi@2024.2.1 / CPE PrgEnv-intel/8.6.0

## Description
Update the **gaeac6** `Intel` modulefiles for `spack-stack oneapi@2024.2.1 / CPE PrgEnv-intel/8.6.0`

## Solution
Update pathing for `modulefiles/ufs_gaeac6.intel.lua` and `modulefiles/ufs_gaeac6.intelllvm.lua` to reflect `spack-stack oneapi@2024.2.1 / CPE PrgEnv-intel/8.6.0` build location

## Alternatives
n/a

## Related to
n/a
