doc/go1.17: document database/sql changes for Go 1.17
doc/go1.17: document database/sql changes for Go 1.17

For #44513
Fixes #46008

Change-Id: If80d484f73a0eb6946abdc654eb2c0d3dd6db416
Reviewed-on: https://go-review.googlesource.com/c/go/+/320251
Reviewed-by: Heschi Kreinick <e89ab2b172855aa0ad01c40c4d8a3535a61ac68a@google.com>
Trust: Robert Findley <9179eee875d1ee628c37fb47d7e749e855ffd21f@google.com>

nawawi/go,cloudflare/go,cloudflare/go,CAFxX/go,golang/go,golang/go,golang/go,CAFxX/go,CAFxX/go,CAFxX/go,nawawi/go,cloudflare/go,cloudflare/go,golang/go,CAFxX/go,golang/go,cloudflare/go,golang/go,CAFxX/go,nawawi/go,nawawi/go,golang/go,nawawi/go,nawawi/go,cloudflare/go,CAFxX/go,nawawi/go,cloudflare/go,nawawi/go,cloudflare/go,CAFxX/go,golang/go