Reduce redundancy in the RequestGraph's file nodes #2296

Job	Run time
Flow	50s
Benchmarks	30m 22s
Lint	1m 11s
Unit tests (ubuntu-latest, Node 18)	2m 56s
Unit tests (macos-latest, Node 18)	6m 12s
Integration tests (ubuntu-latest, Node 18)	12m 10s
Unit tests (windows-latest, Node 18)	11m 53s
Integration tests (macos-latest, Node 18)	14m 36s
Unit tests (ubuntu-latest, Node 20)	3m 8s
Integration tests (windows-latest, Node 18)	17m 55s
Unit tests (macos-latest, Node 20)	10m 46s
Integration tests (ubuntu-latest, Node 20)	8m 54s
Unit tests (windows-latest, Node 20)	12m 13s
Integration tests (macos-latest, Node 20)	13m 24s
Integration tests (windows-latest, Node 20)	21m 28s
Test report	2s
	2h 48m 0s

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