MQE: don't select more data than strictly necessary #10209
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What this PR does
This PR fixes the behaviour of MQE to select only the data necessary for the query.
#9844 introduced an incorrect calculation for the time range required for a selector. The extra millisecond doesn't usually matter, except for range queries that run for exactly
max_partial_query_length, where this incorrect value would result in us returning aerr-mimir-max-query-lengtherror incorrectly.Which issue(s) this PR fixes or relates to
#10067
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX].about-versioning.mdupdated with experimental features.