chore(deps): update dependency google_cloud_cpp to v2.29.0

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
google_cloud_cpp	http_archive	minor	v2.28.0 -> v2.29.0

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Release Notes

googleapis/google-cloud-cpp (google_cloud_cpp)

v2.29.0

Compare Source

New Libraries

We are happy to announce the following GA libraries. Unless specifically noted,
the APIs in these libraries are stable, and are ready for production use.

• GKE Connect API

Bigtable

• fix(bigtable): sanitize RowRange proto input (#​14651)

Compute

• feat(compute): add missing services instant_snapshots and region_instant_snapshots (#​14647)

Spanner

• feat(spanner): support instance edition (#​14678)

Common Libraries

• fix: do not persist the keys loaded from PKCS#12 on Windows (#​14645)
• fix: no need to link gmock_main in mocks (#​14640)
• fix: quickstarts build with bazel (#​14633)

Google APIs interface definitions

• This release is based on definitions as of 2024-08-30T10:45:43-07:00

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[dpebot]

/gcbrun