go: Upgrade 1.20.1 -> 1.20.4

- Remove already upstreamed patches

- Brings a list of changes [1] [2] [3]

[1] https://github.com/golang/go/issues?q=milestone%3AGo1.20.2+label%3ACherryPickApproved
[2] https://github.com/golang/go/issues?q=milestone%3AGo1.20.3+label%3ACherryPickApproved
[3] https://github.com/golang/go/issues?q=milestone%3AGo1.20.4+label%3ACherryPickApproved



Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>