Changes to SQW writer for BIFROST #754

Job	Run time
Formatting and static analysis	18s
Mantid tests	9m 7s
Tests (ubuntu-24.04, 3.11, py311) / package-test	25s
Tests (ubuntu-24.04, 3.11, py311) / test	28m 19s
docs	0s
	38m 9s

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