tools: use latest go version in 'docker-go'

[vigh-m]

Description of changes:
Find the latest go version available in the sdk and set that as the first option in the path when executing the command in the docker-go script.

Testing done:
Before this change:

% make twoliter fetch
.
.
.
go: downloading github.com/sasha-s/go-deadlock v0.3.6
go: downloading github.com/petermattis/goid v0.0.0-20250904145737-900bdf8bb490
go: downloading github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2
go: downloading github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8
go: host-ctr/cmd/host-ctr imports
        github.com/containerd/containerd/pkg/cri/server imports
        github.com/opencontainers/selinux/go-selinux imports
        github.com/cyphar/filepath-securejoin/pathrs-lite imports
        cyphar.com/go-pathrs: unrecognized import path "cyphar.com/go-pathrs": parse https://cyphar.com/go-pathrs?go-get=1: no go-import meta tags ()
go: host-ctr/cmd/host-ctr imports
        github.com/containerd/containerd/pkg/cri/server imports
        github.com/opencontainers/selinux/go-selinux imports
        github.com/cyphar/filepath-securejoin/pathrs-lite/procfs imports
        cyphar.com/go-pathrs/procfs: unrecognized import path "cyphar.com/go-pathrs": parse https://cyphar.com/go-pathrs?go-get=1: no go-import meta tags ()
Error while executing command, exit code: 1
Error: Command was unsuccessful, exit code 105
make: *** [Makefile:65: twoliter] Error 1

After the change:

% % make -e TWOLITER_ALLOW_SOURCE_INSTALL=false -e TWOLITER_ALLOW_BINARY_INSTALL=false -e TWOLITER_SKIP_VERSION_CHECK=true twoliter fetch
go: downloading github.com/containerd/errdefs/pkg v0.3.0
go: downloading github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6
go: downloading cyphar.com/go-pathrs v0.2.1 <--------No failures on this package
go: downloading github.com/sasha-s/go-deadlock v0.3.6
go: downloading github.com/petermattis/goid v0.0.0-20250904145737-900bdf8bb490
go: downloading github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2
go: downloading github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[cbgbt]

lgtm!

You mentioned offline adding a go-latest to the SDK. Could you cut an issue for that? We'd want one in the twoliter repository to make sure we migrate to that when it happens.

[vigh-m]

Yup! Thanks. I've create the two tickets and linked the Twoliter one here.

[vigh-m]

Cancelling in favor of #605