cso: miscellaneous changes in cso_context and cso_cache
Split from !17937 (closed) with changes.
The first 3 commit were reviewed by Pierre-Eric in the other MR. The last 3 commits remain to be reviewed.
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Split from !17937 (closed) with changes.
The first 3 commit were reviewed by Pierre-Eric in the other MR. The last 3 commits remain to be reviewed.