* chore(deps): bump requests from 2.28.1 to 2.31.0 in /.kokoro

Bumps [requests](https://github.com/psf/requests) from 2.28.1 to 2.31.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.28.1...v2.31.0)

---
updated-dependencies:
- dependency-name: requests
  dependency-type: indirect
...

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Source-Link: https://togithub.com/googleapis/synthtool/commit/30bd01b4ab78bf1b2a425816e15b3e7e090993dd
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:9bc5fa3b62b091f60614c08a7fb4fd1d3e1678e326f34dd66ce1eefb5dc3267b

Source-Link: https://togithub.com/googleapis/synthtool/commit/d0f51a0c2a9a6bcca86911eabea9e484baadf64b
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Source-Link: https://togithub.com/googleapis/synthtool/commit/909573ce9da2819eeb835909c795d29aea5c724e
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:ddf4551385d566771dc713090feb7b4c1164fb8a698fe52bbe7670b24236565b

Source-Link: https://togithub.com/googleapis/synthtool/commit/cb960373d12d20f8dc38beee2bf884d49627165e
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:2d816f26f728ac8b24248741e7d4c461c09764ef9f7be3684d557c9632e46dbd

* fix: Add async context manager return types

chore: Mock return_value should not populate oneof message fields

chore: Support snippet generation for services that only support REST transport

chore: Update gapic-generator-python to v1.11.0
PiperOrigin-RevId: 545430278

Source-Link: googleapis/googleapis@601b532

Source-Link: https://github.com/googleapis/googleapis-gen/commit/b3f18d0f6560a855022fd058865e7620479d7af9
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* Add workaround for b/275029141

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