Describe the bug
vmh_test_single() test in work/sof/zephyr/test/vmh.c fails.

To Reproduce

• uncomment SOF_BOOT_TEST and ZTEST in sof/app/debug_overlay.conf
• build SOF with debug enabled "-d"
• boot FW, test is run on boot

Reproduction Rate
100%

Expected behavior
Test should pass

Impact
The failing test caused DSP panics in #8621 . The relation is not fully understood yet, but potentially vmh error can have serious side-impacts that we need to understand

Environment

1. Branch name and commit hash of the 2 repositories: sof (firmware/topology) and linux (kernel driver).
   • Kernel: 20231213 daily
   • SOF: af3fa41 (SOF main)
2. Name of the topology file
   • Topology: n/a
3. Name of the platform(s) on which the bug is observed.
   • Platform: Intel mtl

Screenshots or console output

Running TESTSUITE sof_boot
===================================================================
START - virtual_memory_heap
[    0.505716] <wrn> sof_boot_test: vmh_test_single: Ignoring failure to allocate 1616 in non-contiguous mode
[    0.505723] <err> sof_boot_test: vmh_test_single: Failed to allocate 26
[    0.505845] <err> sof_boot_test: vmh_test: Non-contiguous test error -12
[    0.505850] <err> sof_boot_test: sof_boot_virtual_memory_heap: virtual_memory_heap failed: -12
 FAIL - virtual_memory_heap in 0.001 seconds
===================================================================

#8621 (comment)