database/sql: sql.RawBytes is not compatible with contexts [1.19 backport]

[gopherbot]

@rsc requested issue #60304 to be considered for backport to the next 1.19 minor release.

@gopherbot please backport Go 1.20 and Go 1.19

[mdempsky]

Release planning suggests waiting for the CL to ship in 1.21 RC1 before backporting.

[bradfitz]

Will also need https://go-review.googlesource.com/c/go/+/498398 it turns out.

[dmitshur]

Release planning suggests waiting for the CL to ship in 1.21 RC1 before backporting.

The report in issue #60932 looks relevant to the review of this cherry-pick candidate.

[rsc]

There has been enough uncertainty around the database/sql change that, while I think it is appropriate for Go 1.21, I am inclined to not backport it to Go 1.19.

[cherrymui]

Thanks. We will not backport this to Go 1.19.