chore: convert onFailureStrategy to enum in rust (#2020) #1112

Job	Run time
Build binaries	6m 12s
build-rust-amd64	4m 15s
build-rust-arm64	4m 40s
Build & push linux/amd64 and linux/arm64 (numaflow)	2m 0s
Bom	56s
Release	16s
	18m 19s

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