Update module cloud.google.com/go/spanner to v1.69.0 (#35675)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[cloud.google.com/go/spanner](https://redirect.github.com/googleapis/google-cloud-go)
| `v1.68.0` -> `v1.69.0` |
[![age](https://developer.mend.io/api/mc/badges/age/go/cloud.google.com%2fgo%2fspanner/v1.69.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/go/cloud.google.com%2fgo%2fspanner/v1.69.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/go/cloud.google.com%2fgo%2fspanner/v1.68.0/v1.69.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/go/cloud.google.com%2fgo%2fspanner/v1.68.0/v1.69.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
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receiver/googlecloudspannerreceiver/go.mod

@@ -3,7 +3,7 @@ module github.com/open-telemetry/opentelemetry-collector-contrib/receiver/google
 go 1.22.0
 
 require (
-	cloud.google.com/go/spanner v1.68.0
+	cloud.google.com/go/spanner v1.69.0
 	github.com/ReneKroon/ttlcache/v2 v2.11.0
 	github.com/mitchellh/hashstructure v1.1.0
 	github.com/stretchr/testify v1.9.0