chore: release pubsublite 0.8.0 (googleapis#3785)

chore: release 0.80.0 (googleapis#3805)

chore: release spanner 1.16.0 (googleapis#3786)

* chore: release spanner 1.16.0

* fix: updated to include CMEK feature

Co-authored-by: skuruppu <skuruppu@google.com>

chore: release 0.79.0 (googleapis#3727)

chore: release pubsub 1.10.1 (googleapis#3772)

chore(storage): release v1.15.0 (googleapis#3730)

chore: release datastore 1.5.0 (googleapis#3742)

chore(logging): release v1.3.0 (googleapis#3733)

chore(bigquery): release v1.16.0 (googleapis#3732)

chore: release spanner 1.15.0 (googleapis#3722)

🤖 I have created a release \*beep\* \*boop\*
---
## [1.15.0](https://www.github.com/googleapis/google-cloud-go/compare/v1.14.1...v1.15.0) (2021-02-24)


### Features

* **spanner/admin/database:** add CMEK fields to backup and database ([47037ed](https://www.github.com/googleapis/google-cloud-go/commit/47037ed33cd36edfff4ba7c4a4ea332140d5e67b))
* **spanner/admin/database:** add CMEK fields to backup and database ([16597fa](https://www.github.com/googleapis/google-cloud-go/commit/16597fa1ce549053c7183e8456e23f554a5501de))


### Bug Fixes

* **spanner:** parallelize session deletion when closing pool ([googleapis#3701](https://www.github.com/googleapis/google-cloud-go/issues/3701)) ([75ac7d2](https://www.github.com/googleapis/google-cloud-go/commit/75ac7d2506e706869ae41cf186b0c873b146e926)), refs [googleapis#3685](https://www.github.com/googleapis/google-cloud-go/issues/3685)

This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).