Add query source to DB spans #4178

Job	Run time
falcon, python 3.5, ubuntu-20.04	4m 1s
falcon, python 2.7, ubuntu-20.04	1m 50s
falcon, python 3.6, ubuntu-20.04	3m 45s
falcon, python 3.7, ubuntu-20.04	1m 38s
falcon, python 3.8, ubuntu-20.04	38s
falcon, python 3.9, ubuntu-20.04	47s
falcon, python 3.10, ubuntu-20.04	45s
falcon, python 3.11, ubuntu-20.04	45s
falcon, python 3.12, ubuntu-20.04	3m 9s
falcon latest, python 3.7, ubuntu-20.04	44s
falcon latest, python 3.8, ubuntu-20.04	44s
falcon latest, python 3.9, ubuntu-20.04	41s
falcon latest, python 3.10, ubuntu-20.04	50s
falcon latest, python 3.11, ubuntu-20.04	42s
falcon latest, python 3.12, ubuntu-20.04	3m 17s
All falcon tests passed or skipped	1s
	24m 17s

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