feat(spanner): add samples for spanner opentelemetry instrumentation (#…

…3761)

* feat(spanner): add samples for opentelemetry

* feat(spanner): add TODO

* feat(spanner): comment refactor for OT samples

* feat(spanner): fix lint

* feat(spanner): fix vet

* feat(spanner): remove tests

* feat(spanner): add compatibility warning and no TLS on exporter

* feat(spanner): add sample tag for OT dependencies

* feat(spanner): fix sample tag for OT dependencies

* feat(spanner): fix samples

* feat(spanner):  go mod tidy

* feat(spanner): go mod tidy

* feat(spanner): go mod tidy

* feat(spanner): update spanner version to latest

* feat(spanner): update spanner version to latest

* feat(spanner): apply changes

* move samples to different path

spanner/opentelemetry/go.mod

@@ -0,0 +1,61 @@
+module github.com/GoogleCloudPlatform/golang-samples/spanner/opentelemetry
+
+go 1.20
+
+require (
+	cloud.google.com/go/spanner v1.57.0
+	// [START spanner_opentelemetry_dependencies]
+	go.opentelemetry.io/otel v1.23.1
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.23.1
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.23.1
+	go.opentelemetry.io/otel/metric v1.23.1
+	go.opentelemetry.io/otel/sdk v1.23.1
+	go.opentelemetry.io/otel/sdk/metric v1.23.1
+	// [END spanner_opentelemetry_dependencies]
+	google.golang.org/api v0.164.0
+)
+
+require (
+	cloud.google.com/go v0.112.0 // indirect
+	cloud.google.com/go/compute v1.23.3 // indirect
+	cloud.google.com/go/compute/metadata v0.2.3 // indirect
+	github.com/cenkalti/backoff/v4 v4.2.1 // indirect
+	github.com/census-instrumentation/opencensus-proto v0.4.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/cncf/udpa/go v0.0.0-20220112060539-c52dc94e7fbe // indirect
+	github.com/cncf/xds/go v0.0.0-20231109132714-523115ebc101 // indirect
+	github.com/envoyproxy/go-control-plane v0.11.1 // indirect
+	github.com/envoyproxy/protoc-gen-validate v1.0.2 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/go-logr/logr v1.4.1 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/s2a-go v0.1.7 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.3.2 // indirect
+	github.com/googleapis/gax-go/v2 v2.12.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	go.opencensus.io v0.24.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.47.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.47.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.23.1 // indirect
+	go.opentelemetry.io/otel/trace v1.23.1 // indirect
+	go.opentelemetry.io/proto/otlp v1.1.0 // indirect
+	golang.org/x/crypto v0.19.0 // indirect
+	golang.org/x/net v0.21.0 // indirect
+	golang.org/x/oauth2 v0.17.0 // indirect
+	golang.org/x/sync v0.6.0 // indirect
+	golang.org/x/sys v0.17.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/time v0.5.0 // indirect
+	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
+	google.golang.org/appengine v1.6.8 // indirect
+	google.golang.org/genproto v0.0.0-20240125205218-1f4bbc51befe // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240205150955-31a09d347014 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240205150955-31a09d347014 // indirect
+	google.golang.org/grpc v1.61.0 // indirect
+	google.golang.org/protobuf v1.32.0 // indirect
+)