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sql: disable histogram usage for internal executor
Since cockroachdb#101486, the internal executor has used global defaults for session settings. This effectively enabled `optimizer_use_histograms` for the internal executor, which was disabled before. This caused a huge performance regression. The root cause of the regression is not yet understood. This commit disables `optimizer_use_histograms` as a temporary solution for the performance regression. Informs cockroachdb#102954 Release note: None
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