kubectl 1.29 bindings not published for golang

[larhauga]

ref #539

The golang bindings have not been published for 1.29.

https://github.com/cdklabs/awscdk-asset-kubectl/blob/kubectl-v29/main/CONTRIBUTING.md?plain=1#L55

2. If we decide to support the requested version, a maintainer will open a new branch, kubectl-vY/main
   (Y is the minor version) and update the issue accordingly. The maintainer will also open a branch called kubectl.vY
   in the corresponding go binding repository, cdklabs/awscdk-kubectl-go.

ref awscdk-kubectl-go

[kriscoleman]

Just ran into this and it's a real bummer :(