Update to Prometheus v2.9.2
Update to Prometheus v2.9.2

https://github.com/prometheus/prometheus/releases/tag/v2.9.2

Includes several bugfixes:

[BUGFIX] Make sure subquery range is taken into account for selection #5467
[BUGFIX] Exhaust every request body before closing it #5166
[BUGFIX] Cmd/promtool: return errors from rule evaluations #5483
[BUGFIX] Remote Storage: string interner should not panic in release #5487
[BUGFIX] Fix memory allocation regression in mergedPostings.Seek tsdb#586

Signed-off-by: Mikkel Oscar Lyderik Larsen <81479e3d2d1e6902cb05f938ea9a734a092b1af3@zalando.de>

zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws