Bump cloud.google.com/go/spanner from 1.93.0 to 1.94.0 in /sdks (#39550)

Bumps [cloud.google.com/go/spanner](https://github.com/googleapis/google-cloud-go) from 1.93.0 to 1.94.0.
- [Release notes](https://github.com/googleapis/google-cloud-go/releases)
- [Changelog](https://github.com/googleapis/google-cloud-go/blob/main/CHANGES.md)
- [Commits](googleapis/google-cloud-go@spanner/v1.93.0...spanner/v1.94.0)

---
updated-dependencies:
- dependency-name: cloud.google.com/go/spanner
  dependency-version: 1.94.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

sdks/go.mod

@@ -29,15 +29,15 @@ require (
 	cloud.google.com/go/bigtable v1.50.0
 	cloud.google.com/go/datastore v1.25.0
 	cloud.google.com/go/profiler v0.6.0
-	cloud.google.com/go/pubsub v1.50.4
-	cloud.google.com/go/spanner v1.92.0
-	cloud.google.com/go/storage v1.63.1
-	github.com/aws/aws-sdk-go-v2 v1.42.1
-	github.com/aws/aws-sdk-go-v2/config v1.32.30
-	github.com/aws/aws-sdk-go-v2/credentials v1.19.29
-	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.22.33
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.105.1
-	github.com/aws/smithy-go v1.27.3
+	cloud.google.com/go/pubsub v1.51.0
+	cloud.google.com/go/spanner v1.94.0
+	cloud.google.com/go/storage v1.64.0
+	github.com/aws/aws-sdk-go-v2 v1.43.1
+	github.com/aws/aws-sdk-go-v2/config v1.32.32
+	github.com/aws/aws-sdk-go-v2/credentials v1.19.31
+	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.22.36
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.106.1
+	github.com/aws/smithy-go v1.27.5
 	github.com/docker/go-connections v0.7.0 // indirect
 	github.com/dustin/go-humanize v1.0.1
 	github.com/go-sql-driver/mysql v1.10.0