chore(deps): update dependency google-cloud-datastore to v2.2.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
google-cloud-datastore	==2.1.6 -> ==2.2.0

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Release Notes

googleapis/python-datastore

v2.2.0

Compare Source

Features

• add support for Python 3.10 (#​233) (f524c40)

2.1.6 (2021-07-26)

Documentation

• add Samples section to CONTRIBUTING.rst (#​195) (f607fb5)

2.1.5 (2021-07-20)

Bug Fixes

• deps: pin 'google-{api,cloud}-core', 'google-auth' to allow 2.x versions (#​194) (e94f97c)

2.1.4 (2021-07-09)

Performance Improvements

• further avoid using proto-plus wrapper when unmarshalling entities (#​190) (d0481bf)

Documentation

• omit mention of Python 2.7 in 'CONTRIBUTING.rst' (#​1127) (#​181) (6efde70)

2.1.3 (2021-05-25)

Bug Fixes

• perf: improve performance unmarshalling entities from protobuf2 (#​175) (0e5b718)

2.1.2 (2021-05-03)

Bug Fixes

• pass transaction's options to API in 'begin' (#​143) (924b10b)

Documentation

• update intersphinx URLs for grpc and auth (#​93) (4f90d04)

2.1.1 (2021-04-20)

Bug Fixes

• make HTTPDatastoreAPI compatible w/ microgen Gapic API (#​136) (d522799)
• optimize protobuf access for performance (#​155) (5b67daa), closes #​145 #​150

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[leahecole]

We need to create a datastore in the new project but I don't have permissions - @parthea can we make it so that @GoogleCloudPlatform/python-samples-owners have permissions in the new 310 project?