Reduce redundancy in the RequestGraph's file nodes #2288

Job	Run time
Lint	59s
Benchmarks	31m 26s
Flow	1m 11s
Unit tests (ubuntu-latest, Node 18)	2m 59s
Unit tests (macos-latest, Node 18)	10m 12s
Integration tests (ubuntu-latest, Node 18)	11m 6s
Unit tests (windows-latest, Node 18)	10m 19s
Unit tests (ubuntu-latest, Node 20)	2m 47s
Integration tests (macos-latest, Node 18)	15m 44s
Unit tests (macos-latest, Node 20)	7m 17s
Integration tests (windows-latest, Node 18)	14m 54s
Unit tests (windows-latest, Node 20)	11m 21s
Integration tests (ubuntu-latest, Node 20)	10m 56s
Integration tests (macos-latest, Node 20)	20m 13s
Integration tests (windows-latest, Node 20)	17m 42s
Test report	3s
	2h 49m 9s

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