Implement Reader Performance Queries for /datafiles and /datasets #1022

Job	Run time
Code Formatting	27s
icatdb Generator Script Consistency Test	18m 20s
Linting	34s
Pip Install 3.6 Test	34s
Pip Install 3.7 Test	41s
Dependency Safety	31s
Pip Install 3.8 Test	32s
Pip Install 3.9 Test	29s
Python 3.6 Build & Tests	13m 22s
Pip Install 3.10 Test	34s
Python 3.7 Build & Tests	13m 33s
Python 3.8 Build & Tests	13m 11s
Python 3.9 Build & Tests	13m 36s
Python 3.10 Build & Tests	15m 6s
Docker	40s
	1h 32m 10s

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