mod: bump etcd to v3.5.7

[joostjager]

Fix etcd-io/etcd#14268

[guggero]

Looks like this version of etcd doesn't compile on darwin amd64:

 Error: ../../../../go/pkg/mod/go.etcd.io/etcd/server/[email protected]/wal/wal.go:119:34: not enough arguments in call to fileutil.CreateDirAll
	have (string)
	want (*zap.Logger, string)

[joostjager]

Bumped to the next version 3.5.7 to see if that's better.

[guggero]

Doesn't seem to be the case. Do we need to create an issue in their repo? Sounds like something small.

EDIT: I think it's because we don't use the latest server version as well.
This replace fixed it for me:

replace go.etcd.io/etcd/server/v3 => go.etcd.io/etcd/server/v3 v3.5.7

[guggero]

Also, I think to avoid needing the replace, we instead should bump the dependencies correctly in the kvdb/go.mod file, merge, tag and then it will be bumped in the main mod file automatically when we go to the next kvdb tagged version.

[joostjager]

Created first step here: #7353

[joostjager]

@ellemouton not sure if I am supposed to bump kvdb here before merge of #7252 ?

[joostjager]

@ellemouton fixed the final bump in 2fd4f3f, closing.