Reindex setReindexSettings was returning 400s and this is not caught anywhere in the reindex flow

[RafaPolit]

Describe the bug
The reindex script has a setReindexSettings function that does a PUT call to the ES index to update the values.

This call has, for who knows how long, been returning a 400. But this is not a caught error in any way, therefore both the optimization process and the restoring of the production values are not being executed as expected. While the issue of the PUT call returning a [400] is fixed in #7676 , if this happens again of the PUT calls return 400 for any reason, this will not get caught by the current implementation. This needs to be developed and fixed.