chore: Expose env to disable read ahead in source (#2297) #1250

Job	Run time
Build binaries	2m 6s
build-rust-arm64	7m 42s
build-rust-amd64	6m 10s
Build & push linux/amd64 and linux/arm64 (numaflow)	2m 25s
Bom	1m 19s
Release	27s
	20m 9s

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