webstreams: narrow ReadableStreamBYOBRequest.view to Uint8Array #5975

Job	Run time
collect-openssl-versions	8s
Build slim tarball	2m 33s
aarch64-linux: Cache V8 build	3s
aarch64-darwin: with shared libraries	20m 21s
x86_64-darwin: with shared libraries	45m 36s
x86_64-linux: with shared libraries	25m 26s
aarch64-linux: with shared openssl_3_6 (3.6.1)	21m 19s
aarch64-linux: with shared openssl_1_1 (1.1.1w)	21m 3s
aarch64-linux: with shared openssl_3 (3.0.19)	20m 38s
aarch64-linux: with shared openssl_3_5 (3.5.5)	20m 19s
aarch64-linux: with shared openssl_4_0 (4.0.0)	21m 37s
	3h 19m 3s

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