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Draft: Don't ignore pinning failures when this was requested

Szilárd Páll requested to merge sz_improve-pinning-failure-messages-and-honor-pin-on into release-2022

If pinning fails on any thread across the simulation, a harmless-looking note will be issued in the log and mdrun will always continue. When mdrun -pin on requests thread pinning, failures to set affinities should not be ignored as this can lead to major performance loss.

This change improves error reporting to inform users when setting affinities failed and honors the manual pinning request by terminating the run if affinity setting failed.

Fixes #4350

Edited by Szilárd Páll

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