SL-64089: Escape multusharding request for `#delete_all` #9

Job	Run time
Ruby 2.7 / rails_6.1 w/ prepared statements	57s
Ruby 2.7 / rails_6.1	1m 5s
Ruby 2.7 / active_record_6.1 w/ prepared statements	59s
Ruby 2.7 / active_record_6.1	1m 10s
	4m 11s

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