Update Go version in Docker, and re-enable SCC/Scorecard

[GregSutcliffe]

Description
This commit fixes a couple of things.

Firstly, the install-go script uses an ancient version of Go that conflicts with the newer version needed for SCC, so that is updated. That script also wrapped the install in a function for no apparent reason, so I simplified it.

Second, I re-enabled the SCC & Scorecard installs. These have been commented out for some time, apparently because of the Go issues. Rather than uncomment it, I copied the relevant parts from workers.sh because the container doesn't need checks about whether directories exist - these are guaranteed not to exist in a fresh container.

Notes for Reviewers

I believe this will result in working SCC and Scorecard calculations in the container now

Signed commits

• [x ] Yes, I signed my commits.

[sgoggins]

Awesome! LGTM!

[GregSutcliffe]

Thanks @sgoggins - for the record I don't think this affects #2952, as I've not touched the rust build part at all. I suspect that was a transient failure to download rust - I have a plan to move the image to use build layers (see #2947 for some of that) which will help there, but ENOTIME :)