#741: hoist GAE/GCD detection into `gcloud._helpers`

Source-Link: googleapis/synthtool@8d392a5
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:a0c4463fcfd9893fc172a3b3db2b6ac0c7b94ec6ad458c7dcea12d9693615ac3

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Source-Link: googleapis/synthtool@8d392a5
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:a0c4463fcfd9893fc172a3b3db2b6ac0c7b94ec6ad458c7dcea12d9693615ac3

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

🤖 I have created a release \*beep\* \*boop\* 
---
### [0.40.3](https://www.github.com/googleapis/gapic-generator-python/compare/v0.40.2...v0.40.3) (2021-01-21)


### Bug Fixes

* stabilize order of query_params ([#742](https://www.github.com/googleapis/gapic-generator-python/issues/742)) ([2835ddb](https://www.github.com/googleapis/gapic-generator-python/commit/2835ddbe62b520e2e4c84f02810b1ac936c9cbb9))
---


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

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

* chore: release 3.0.0

Release-As: 3.0.0

* fix: downgrade google-cloud-spanner to v 3.11.1

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [cachetools](https://redirect.github.com/tkem/cachetools) | `==6.1.0` -> `==6.2.0` | [![age](https://developer.mend.io/api/mc/badges/age/pypi/cachetools/6.2.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/cachetools/6.1.0/6.2.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>tkem/cachetools (cachetools)</summary>

### [`v6.2.0`](https://redirect.github.com/tkem/cachetools/blob/HEAD/CHANGELOG.rst#v620-2025-08-25)

[Compare Source](https://redirect.github.com/tkem/cachetools/compare/v6.1.0...v6.2.0)

\===================

- Improve general `RRCache` performance by storing cache keys in an
  additional sequence container.  Note that this will increase memory
  consumption.

- Add more unit tests.

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/googleapis/python-spanner-sqlalchemy).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS44Mi43IiwidXBkYXRlZEluVmVyIjoiNDEuODIuNyIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

)

Source-Link: googleapis/synthtool@7804ade
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:eede5672562a32821444a8e803fb984a6f61f2237ea3de229d2de24453f4ae7d

Source-Link: googleapis/synthtool@050953d
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:65e656411895bff71cffcae97246966460160028f253c2e45b7a25d805a5b142

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>