[Merged by Bors] - Update to go 1.20

[fasmat]

Motivation

Go 1.19 is now EOL and won't be updated any more. This PR updates our codebase to 1.20.

Changes

• update all uses of go to 1.20: go.mod, Dockerfiles, documentation
• instead of top-level deprecated math/rand functions use crypto/rand or an instance of *rand.Rand instead
• use errors.Join instead of github.com/hashicorp/go-multierror
• fix staticcheck and lint complaints

Test Plan

TODO

• Explain motivation or link existing issue(s)
• Test changes and document test plan
• Update documentation as needed

DevOps Notes

• This PR does not require configuration changes (e.g., environment variables, GitHub secrets, VM resources)
• This PR does not affect public APIs
• This PR does not rely on a new version of external services (PoET, elasticsearch, etc.)
• This PR does not make changes to log messages (which monitoring infrastructure may rely on)

[codecov]

Codecov Report

Merging #4864 (62e43bd) into develop (00b8792) will increase coverage by 0.1%.
Report is 1 commits behind head on develop.
The diff coverage is 46.6%.

@@            Coverage Diff            @@
##           develop   #4864     +/-   ##
=========================================
+ Coverage     76.8%   77.0%   +0.1%     
=========================================
  Files          261     260      -1     
  Lines        29720   29626     -94     
=========================================
- Hits         22852   22831     -21     
+ Misses        5416    5344     -72     
+ Partials      1452    1451      -1     

Files Changed	Coverage Δ
activation/handler.go	76.6% <0.0%> (ø)
api/grpcserver/events.go	68.0% <0.0%> (-8.0%)	⬇️
checkpoint/runner.go	77.8% <0.0%> (ø)
common/types/testutil.go	72.7% <ø> (ø)
datastore/store.go	69.9% <0.0%> (ø)
genvm/core/context.go	76.5% <0.0%> (ø)
genvm/rewards.go	80.0% <0.0%> (ø)
genvm/templates/vault/handler.go	66.6% <0.0%> (ø)
hare/hare.go	75.2% <0.0%> (ø)
activation/nipost.go	84.1% <33.3%> (ø)
... and 9 more

... and 3 files with indirect coverage changes

[fasmat]

bors try

[bors]

try

Build succeeded!

The publicly hosted instance of bors-ng is deprecated and will go away soon.

If you want to self-host your own instance, instructions are here.
For more help, visit the forum.

If you want to switch to GitHub's built-in merge queue, visit their help page.

• ci-status
• systest-status

[fasmat]

I would like to also upgrade to 1.21 after this is merged, but will do it in 2 steps to keep the changes easier to review and test.

[fasmat]

bors merge

[bors]

Pull request successfully merged into develop.

Build succeeded!

The publicly hosted instance of bors-ng is deprecated and will go away soon.

If you want to self-host your own instance, instructions are here.
For more help, visit the forum.

If you want to switch to GitHub's built-in merge queue, visit their help page.

• ci-status
• systest-status