os: Read of a device driver fails only with Go 1.20 [1.20 backport]

[gopherbot]

@ianlancetaylor requested issue #60211 to be considered for backport to the next 1.20 minor release.

@gopherbot Please open backport for 1.20.

This is an edge case that broke in the 1.20 release.

[gopherbot]

Change https://go.dev/cl/496015 mentions this issue: [release-branch.go1.20] os: if descriptor is non-blocking, retain that in Fd method

[gopherbot]

Closed by merging 9270e3b to release-branch.go1.20.

[gopherbot]

Change https://go.dev/cl/496715 mentions this issue: [release-branch.go1.20] net, os: net.Conn.File.Fd should return a blocking descriptor