CL-8980: make read_file continuation failures recoverable rather than terminal #2754

Job	Run time
static-analysis	46s
build	9s
test (3/4)	40s
test (4/4)	43s
test (1/4)	39s
test (2/4)	1m 20s
test (one-process pollution detector)	0s
typecheck	2s
eslint	3s
prettier	2s
test (src)	3s
build-and-test	3s
	4m 30s

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