Update prefetcher to increment client read window linearly with each read #3743

Job	Run time
Integration / Approval Gate	2s
Integration / FS Tests (S3XOZ, AL2 arm, FUSE 2)	8m 19s
Integration / Client Tests (S3, AL2 arm, Test Pool)	5m 4s
Integration / fstab tests (Ubuntu x86	4m 36s
Integration / Address sanitizer	7m 53s
Integration / FS Tests (S3, AL2 arm, FUSE 2)	7m 22s
Integration / FS Tests (S3, Ubuntu x86, FUSE 3)	9m 53s
Integration / FS Tests (S3, Ubuntu x86, FUSE 2)	9m 2s
Integration / Client Tests (S3, Ubuntu x86, Default Pool)	8m 14s
Integration / FS Tests (S3XOZ, Ubuntu x86, FUSE 2)	9m 32s
Integration / Client Tests (S3, AL2 arm, Default Pool)	5m 2s
Integration / Client Tests (S3, Ubuntu x86, Test Pool)	5m 48s
Integration / fstab tests (AL2 arm	3m 46s
Integration / Client Tests (S3, AL2 arm, FS Pool)	5m 7s
Integration / FS Tests (S3XOZ, Ubuntu x86, FUSE 3)	8m 41s
Integration / Client Tests (S3XOZ, AL2 arm, Test Pool)	3m 48s
Integration / Client Tests (S3XOZ, Ubuntu x86, Default Pool)	4m 19s
Integration / Client Tests (S3, Ubuntu x86, FS Pool)	6m 38s
Integration / Client Tests (S3XOZ, Ubuntu x86, FS Pool)	4m 49s
Integration / Client Tests (S3XOZ, Ubuntu x86, Test Pool)	5m 47s
Integration / Client Tests (S3XOZ, AL2 arm, Default Pool)	3m 41s
Integration / Client Tests (S3XOZ, AL2 arm, FS Pool)	3m 48s
	2h 11m 11s

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