Bump OpenTelemetry dependencies to v1.7.0

[lucacome]

Bumps OpenTelemetry dependencies to v1.7.0

[ahrtr]

This is the probably 4th attempt to bump the OpenTelemetry. Note that all previous attempts were failed. It could be due to the behavior change on the new gRPC version.

It would be helpful if you get it resolved.

[lucacome]

@ahrtr I noticed unfortunately 😭 but I wanted to give it a try

[lucacome]

I think one of the problems is

go.etcd.io/etcd/raft/v3/raftpb imports
	github.com/golang/protobuf/proto tested by
	github.com/golang/protobuf/proto.test imports
	github.com/google/go-cmp/cmp imports
	github.com/google/go-cmp/cmp/internal/value loaded from github.com/google/[email protected],
	but go 1.16 would select v0.5.6

To upgrade to the versions selected by go 1.16:
	go mod tidy -go=1.16 && go mod tidy -go=1.17
If reproducibility with go 1.16 is not needed:
	go mod tidy -compat=1.17
For other options, see:
	https://golang.org/doc/modules/pruning

[ptabor]

I was looking into this. The real problem is grpc upgrade and it seems that new grpc version is more strict about format of the 'connection targets'. In particular our tests depend a lot on unix://localhost:port, while
according to grpc standard:
https://grpc.github.io/grpc/cpp/md_doc_naming.html
the supported names are: unix:path or unix://absolute_path (so unix:///tmp/foo).

Etcd also assumes ability to parse out the port from the url... so there is a lot of legacy to scribe here.

[serathius]

In particular our tests depend a lot on unix://localhost:port, while according to grpc standard: https://grpc.github.io/grpc/cpp/md_doc_naming.html the supported names are: unix:path or unix://absolute_path (so unix:///tmp/foo).

This is very important think to note. Thanks @ptabor for pointing this out I think we should working towards grpc url standards to avoid similar issues in future.

[codecov-commenter]

Codecov Report

Merging #14104 (4a1cfad) into main (a1fe0b8) will decrease coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #14104      +/-   ##
==========================================
- Coverage   75.43%   75.24%   -0.20%     
==========================================
  Files         454      454              
  Lines       36938    36916      -22     
==========================================
- Hits        27864    27777      -87     
- Misses       7344     7411      +67     
+ Partials     1730     1728       -2     

Flag	Coverage Δ
all	75.24% <ø> (-0.20%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
server/embed/config_tracing.go	18.33% <ø> (ø)
client/v3/snapshot/v3_snapshot.go	0.00% <0.00%> (-54.35%)	⬇️
server/auth/simple_token.go	80.00% <0.00%> (-8.47%)	⬇️
server/etcdserver/api/v3lock/lock.go	61.53% <0.00%> (-8.47%)	⬇️
server/storage/schema/membership.go	51.82% <0.00%> (-8.03%)	⬇️
server/etcdserver/cindex/cindex.go	84.90% <0.00%> (-7.55%)	⬇️
server/etcdserver/api/v2stats/queue.go	20.83% <0.00%> (-7.38%)	⬇️
server/storage/schema/cindex.go	94.87% <0.00%> (-5.13%)	⬇️
raft/rafttest/node.go	95.00% <0.00%> (-5.00%)	⬇️
client/v3/concurrency/session.go	88.63% <0.00%> (-4.55%)	⬇️
... and 27 more

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[ptabor]

Closing as it's done in #14125

[lucacome]

@ptabor it looks like only grpc was updated, not otel? 🤔