WIP *: bump up default Go runtime for tests

[gyuho]

Already uploaded to gcr.io.

For #10438.

/cc @xiang90 @jpbetz @hexfusion

Will do the patch release next week.

[codecov-io]

Codecov Report

Merging #10441 into master will decrease coverage by 0.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #10441      +/-   ##
==========================================
- Coverage   71.61%   71.43%   -0.18%     
==========================================
  Files         392      391       -1     
  Lines       36489    36472      -17     
==========================================
- Hits        26131    26055      -76     
- Misses       8531     8588      +57     
- Partials     1827     1829       +2

Impacted Files	Coverage Δ
clientv3/retry.go	87.27% <ø> (ø)	⬆️
clientv3/retry_interceptor.go	67.2% <ø> (+1.41%)	⬆️
clientv3/client.go	80% <ø> (+1.12%)	⬆️
clientv3/balancer/grpc1.7-health.go	46.22% <0%> (-13.67%)	⬇️
proxy/grpcproxy/register.go	69.44% <0%> (-11.12%)	⬇️
clientv3/leasing/util.go	91.66% <0%> (-6.67%)	⬇️
pkg/adt/interval_tree.go	79.87% <0%> (-6.61%)	⬇️
clientv3/namespace/watch.go	87.87% <0%> (-6.07%)	⬇️
etcdserver/v2_server.go	80.76% <0%> (-3.85%)	⬇️
pkg/testutil/recorder.go	77.77% <0%> (-3.71%)	⬇️
... and 15 more

---

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[xiang90]

lgtm

[spzala]

@gyuho hi, should not we remove these two references as well?
gosimple - https://github.com/etcd-io/etcd/blob/master/tests/Dockerfile#L52
unused - https://github.com/etcd-io/etcd/blob/master/tests/Dockerfile#L53

[spzala]

@gyuho I have fetched this PR in my env, made couple of changes and pushed it under #10631 Hope makes sense. I will keep this PR open as WIP but will close eventually in favor of the new PR.
@xiang90 you already have a lgtm on this PR so can you please take a look at the #10631 :-) Thanks!

[xiang90]

this is already fixed by @spzala right? /cc @gyuho

[gyuho]

@spzala @xiang90 Yes, right. Thanks!

[spzala]

Thanks @xiang90 @gyuho - I have also closed couple of other related issues.

[spzala]

this is already fixed by @spzala right? /cc @gyuho

@xiang90 sorry for the delayed response due to vacation travel :-)