Update Spack environment used

Squash branch 'runnerUpdate' into 'master'

* Update spack environment used

Changes build environment to use a Spack installed environment

**Developer Checklist:**
- [x] Have you done a self-review after creating the merge request?
- [x] Have you filled in the Merge Request information (title, description) thoroughly?
- [x] Have you updated the relevant tickets (if this MR is linked to any VERA-dev tickets)?
- [ ] Have you addressed all suggested feedback and commented on it to let the reviewer know? (Do not resolve discussions that the reviewer started)

**Reviewer Checklist:**
- [x] Have you confirmed all discussions were adequately addressed and resolved them all?
- [x] Does it conform to formatting guidelines?
- [x] Are there adequate and clear comments?
- [x] Is the design clean and sensible?
- [x] Are the changes optimal/efficient?
- [x] Were sufficient DBC checks added?
- [x] Are there unit tests? (if necessary)
- [x] Is the MR description clear, including a link to the VERA-Dev issue if appropriate?

**PSM Checklist**
- [x] Have you confirmed that all discussions were addressed, or that follow-on issues have been created for them?
- [x] Have you confirmed sufficient testing was conducted?
- [x] Does this impact other repositories?
- [x] Does the MR have an adequate description?
- [x] If the MR has multiple commits, did you set the MR to squash merge?

See merge request https://code.ornl.gov/futility/Futility/-/merge_requests/406