chore(deps): update dependency com.google.api:gax to v2.7.0 (#6377)
chore(deps): update dependency com.google.api:gax to v2.7.0 (#6377)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.api:gax](https://togithub.com/googleapis/gax-java) | `2.6.1` -> `2.7.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.api:gax/2.7.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.api:gax/2.7.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.api:gax/2.7.0/compatibility-slim/2.6.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.api:gax/2.7.0/confidence-slim/2.6.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/gax-java</summary>

### [`v2.7.0`](https://togithub.com/googleapis/gax-java/blob/master/CHANGELOG.md#&#8203;270-httpswwwgithubcomgoogleapisgax-javacomparev260v270-2021-11-03)

[Compare Source](https://togithub.com/googleapis/gax-java/compare/v2.6.1...v2.7.0)

##### Features

-   add batch throttled time to tracer ([#&#8203;1463](https://www.togithub.com/googleapis/gax-java/issues/1463)) ([14c25cd](https://www.github.com/googleapis/gax-java/commit/14c25cdfae2c0602d99fcd07c9067138fc172a7f))
-   add google-c2p dependence to DirectPath ([#&#8203;1521](https://www.togithub.com/googleapis/gax-java/issues/1521)) ([d4222e7](https://www.github.com/googleapis/gax-java/commit/d4222e757d35e874a57d030f2f964e8d61c71d6d))
-   next release from main branch is 2.7.0 ([#&#8203;1530](https://www.togithub.com/googleapis/gax-java/issues/1530)) ([a96953e](https://www.github.com/googleapis/gax-java/commit/a96953e2c889ad9195b420ce5ae49b20258fb6ea))
-   pass request in ApiTracer ([#&#8203;1491](https://www.togithub.com/googleapis/gax-java/issues/1491)) ([27bf265](https://www.github.com/googleapis/gax-java/commit/27bf2655120972d929e6118b73d8d556b0440fcf))

##### Bug Fixes

-   call ResponseMetadataHanlder#onTrailers before calling onClose ([#&#8203;1549](https://www.togithub.com/googleapis/gax-java/issues/1549)) ([19a77a4](https://www.github.com/googleapis/gax-java/commit/19a77a4f6c62e84bba4879690992bbc494730d23))
-   declare depenencies of API surfaces as api ([#&#8203;1535](https://www.togithub.com/googleapis/gax-java/issues/1535)) ([725414f](https://www.github.com/googleapis/gax-java/commit/725414f4ccb1e5ac4625790ea990c6c8dfa4fdff))

</details>

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