Log recoverable remote write errors as warnings (#8412)
Log recoverable remote write errors as warnings (#8412)

Signed-off-by: Chris Marchbanks <0ad0b538c51a24737b83a297dff91636ee98d89e@gmail.com>
prometheus/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,alileza/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,prometheus/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,alileza/prometheus,prometheus/prometheus