dev: skip running tests as part of dev bench

Slipped in as part of cockroachdb#76189. Before this patch we were unintentionally
running all unit tests in whatever package was targeted. To repro, try:

    dev bench pkg/server -f='BenchmarkSetupSpanForIncomingRPC'

Release note: None

pkg/cmd/dev/bench.go

@@ -105,6 +105,7 @@ func (d *dev) bench(cmd *cobra.Command, commandLine []string) error {
 		args = append(args, "--nocache_test_results")
 	}
 
+	args = append(args, "--test_arg", "-test.run=-")
 	if filter == "" {
 		args = append(args, "--test_arg", "-test.bench=.")
 	} else {

pkg/cmd/dev/testdata/datadriven/bench

@@ -1,15 +1,15 @@
 dev bench pkg/spanconfig/...
 ----
-bazel test pkg/spanconfig/...:all --test_arg -test.bench=. --test_output errors
+bazel test pkg/spanconfig/...:all --test_arg -test.run=- --test_arg -test.bench=. --test_output errors
 
 dev bench pkg/sql/parser --filter=BenchmarkParse
 ----
-bazel test pkg/sql/parser:all --test_arg -test.bench=BenchmarkParse --test_output errors
+bazel test pkg/sql/parser:all --test_arg -test.run=- --test_arg -test.bench=BenchmarkParse --test_output errors
 
 dev bench pkg/bench -f=BenchmarkTracing/1node/scan/trace=off --count=2 --bench-time=10x --bench-mem
 ----
-bazel test pkg/bench:all --test_arg -test.bench=BenchmarkTracing/1node/scan/trace=off --test_arg -test.count=2 --test_arg -test.benchtime=10x --test_arg -test.benchmem --test_output errors
+bazel test pkg/bench:all --test_arg -test.run=- --test_arg -test.bench=BenchmarkTracing/1node/scan/trace=off --test_arg -test.count=2 --test_arg -test.benchtime=10x --test_arg -test.benchmem --test_output errors
 
 dev bench pkg/spanconfig/spanconfigkvsubscriber -f=BenchmarkSpanConfigDecoder --cpus=10 --ignore-cache -v --timeout=50s
 ----
-bazel test --local_cpu_resources=10 --test_timeout=50 pkg/spanconfig/spanconfigkvsubscriber:all --nocache_test_results --test_arg -test.bench=BenchmarkSpanConfigDecoder --test_arg -test.v --test_output all
+bazel test --local_cpu_resources=10 --test_timeout=50 pkg/spanconfig/spanconfigkvsubscriber:all --nocache_test_results --test_arg -test.run=- --test_arg -test.bench=BenchmarkSpanConfigDecoder --test_arg -test.v --test_output all