Flaky test: TestErrorFromResolver

[easwars]

--- FAIL: Test (2.95s)
    --- FAIL: Test/ErrorFromResolver (0.01s)
        tlogger.go:116: INFO clusterresolver.go:86 [xds] [xds-cluster-resolver-lb 0xa12a0e0] Created  (t=+20.4µs)
        tlogger.go:116: INFO clusterresolver.go:163 [xds] [xds-cluster-resolver-lb 0xa12a0e0] Received new balancer config: {
              "discoveryMechanisms": [
                {
                  "cluster": "test-cluster-name",
                  "edsServiceName": "test-eds-service-name",
                  "outlierDetection": {}
                }
              ]
            }  (t=+321.398µs)
        tlogger.go:116: INFO clusterresolver.go:221 [xds] [xds-cluster-resolver-lb 0xa12a0e0] Built child policy config: {}  (t=+1.201592ms)
        tlogger.go:116: INFO clusterresolver.go:221 [xds] [xds-cluster-resolver-lb 0xa12a0e0] Built child policy config: {}  (t=+1.377991ms)
        tlogger.go:116: WARNING clusterresolver.go:239 [xds] [xds-cluster-resolver-lb 0xa12a0e0] Received error: connection error  (t=+1.410691ms)
        clusterresolver_test.go:402: eds impl got EDS resp, want timeout error
        tlogger.go:116: INFO clusterresolver.go:307 [xds] [xds-cluster-resolver-lb 0xa12a0e0] Shutdown  (t=+11.674622ms)
FAIL
FAIL	google.golang.org/grpc/xds/internal/balancer/clusterresolver	6.326s

https://github.com/grpc/grpc-go/actions/runs/4326397969/jobs/7553761406

[easwars]

Ran it 100K times in google3 without a repro :(

[easwars]

https://github.com/grpc/grpc-go/actions/runs/4378232100/jobs/7662709868

[arvindbr8]

https://github.com/grpc/grpc-go/actions/runs/4378232100/jobs/7662709868