check-sr-results-ir1.yaml: tune for 32b

- Align dh.log checks with ir1 branch.
- Reduce number os tested OSes for 32b.

This allows to use the latest version of the checker on IR v1.x results
(even if this is only for development and not for certification).

Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>