fix: fix `constructorof` for `NonlinearLeastSquaresProblem` #591

Job	Run time
Tests (1, Core) / Tests - Core	9m 40s
Tests (1, Downstream) / Tests - Downstream	33m 43s
Tests (1, Python) / Tests - Python	11m 20s
Tests (1, QA) / Tests - QA	5m 49s
Tests (lts, Core) / Tests - Core	9m 37s
Tests (lts, Python) / Tests - Python	9m 19s
Tests (lts, Downstream) / Tests - Downstream	29m 30s
Tests (lts, QA) / Tests - QA	6m 25s
Tests (pre, Core) / Tests - Core	9m 25s
Tests (pre, Downstream) / Tests - Downstream	34m 0s
Tests (pre, Python) / Tests - Python	11m 43s
Tests (pre, QA) / Tests - QA	8m 10s
	2h 58m 41s

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