Cv32e40s/merge dev to rel 8

Created by: silabs-robin

Starting the next round of the merge procedure. This PR is 40s "dev"->"release". Passes "rel_check" on xcelium, except(!) for the two known problems in "csr_access_test" and "readonly_csr_access_test".

I think we should do this merge despite the two known problems. The 40s is WIP. And I think frequent merges has a higher value than waiting for everything to be fixed and pristine (potentially inviting new failures in the meantime). We can wait, if anyone think it is better to have the "rel_check" passing 100% first. @silabs-hfegran @silabs-mateilga @MikeOpenHWGroup

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Note. The 40p didn't completely finish the previous round (see https://github.com/openhwgroup/core-v-verif/pull/1160). But I think the 40s and 40x can do one round just the two of them. The "rel_check"s for all 3 cores will be done on "master", so the 40p will still be tested. Doing the merges frequently like this should make each diff smaller and much easier to handle.