tests: kernel.common.stack_sentinel: exclude `m2gl025_miv`

This commit excludes the `m2gl025_miv` platform from running the
`kernel.common.stack_sentinel` test. It experiences the same issue as
`hifive1`, which was described in issue #66070.

Signed-off-by: Filip Kokosinski <fkokosinski@antmicro.com>