MB-37008: Magma - track get failures for getWithHeader and getRange
MB-37008: Magma - track get failures for getWithHeader and getRange

Currently we only track get failures in stats for getMulti. Track this
stat for getWithHeader and getRange also.

Change-Id: I74ded5c9d06a9bb74f940fad1d9b7f16f4fc52ff
Reviewed-on: http://review.couchbase.org/c/kv_engine/+/125041
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine