chore(deps): update dependency google-cloud-storage to v2.7.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
google-cloud-storage	==2.6.0 -> ==2.7.0

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Release Notes

googleapis/python-storage

### [`v2.7.0`](https://togithub.com/googleapis/python-storage/blob/HEAD/CHANGELOG.md#​270-httpsgithubcomgoogleapispython-storagecomparev260v270-2022-12-07) [Compare Source](https://togithub.com/googleapis/python-storage/compare/v2.6.0...v2.7.0) ##### Features - Add "transfer_manager" module for concurrent uploads and downloads, as a preview feature ([#​943](https://togithub.com/googleapis/python-storage/issues/943)) ([9998a5e](https://togithub.com/googleapis/python-storage/commit/9998a5e1c9e9e8920c4d40e13e39095585de657a)) - Add use_auth_w_custom_endpoint support ([#​941](https://togithub.com/googleapis/python-storage/issues/941)) ([5291c08](https://togithub.com/googleapis/python-storage/commit/5291c08cc76a7dbd853e51c19c944f6336c14d26)) ##### Bug Fixes - Implement closed property on fileio.py classes ([#​907](https://togithub.com/googleapis/python-storage/issues/907)) ([64406ca](https://togithub.com/googleapis/python-storage/commit/64406ca70cef98a81f6bb9da6e602196f4235178))

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