This reverts commit 34a4202.

…icker

Hashring test perf fix

This changes the default for OTEL sample ratio to
be 1% instead of 20%.

Our experience running SpiceDB in production has
made it clear that 20% is far too large of a
default sample ratio for most deployments.

gomod: bump cobrautil

Appeared to be a race condition

Stress output:

$ stress ./server.test -test.run=TestServerGracefulTermination -test.cpu=2 -test.timeout=5s
5s: 951 runs so far, 0 failures
10s: 1992 runs so far, 0 failures
15s: 3071 runs so far, 0 failures
20s: 4134 runs so far, 0 failures
25s: 5159 runs so far, 0 failures
30s: 6215 runs so far, 0 failures

Fixes authzed#1236

Fix flakiness of graceful termination test

Also unblocks moving forward on gRPC

Fixes authzed#1247

Move to v4 of kuberesolver