Describe the bug
A DSP panic started showing up in CI runs on 27th June. No individual PR merged recently shows this in test results, so suspcion is a combination of PRs merged. Current suspect:

• west.yml: update Zephyr to 97a97c744a29 #9241
• app: boards: intel_adsp_ace15_mtpm: disable IMR context-save #9232

Both passed tested independently, but in together there seem to be DSP panics.

To Reproduce
https://sof-ci.01.org/sofpr/PR9267/build6051/devicetest/index.html

Reproduction Rate
Very high (most PR CI runs on 27th June)

Expected behavior
No DSP panics

Impact
Blocking CI

Environment
https://sof-ci.01.org/sofpr/PR9265/build6047/devicetest/index.html
https://sof-ci.01.org/sofpr/PR9267/build6051/devicetest/index.html