chore(deps): update dependency com.google.cloud:google-cloud-dataflow to v0.7.0 (#7229)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-dataflow](https://togithub.com/googleapis/java-dataflow) | `0.6.0` -> `0.7.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-dataflow/0.7.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-dataflow/0.7.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-dataflow/0.7.0/compatibility-slim/0.6.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-dataflow/0.7.0/confidence-slim/0.6.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v0.7.0`](https://togithub.com/googleapis/java-dataflow/blob/HEAD/CHANGELOG.md#&#8203;070-httpsgithubcomgoogleapisjava-dataflowcomparev061v070-2022-07-01)

[Compare Source](https://togithub.com/googleapis/java-dataflow/compare/v0.6.1...v0.7.0)

##### Features

-   Enable REST transport for most of Java and Go clients ([#&#8203;182](https://togithub.com/googleapis/java-dataflow/issues/182)) ([5a7f987](https://togithub.com/googleapis/java-dataflow/commit/5a7f9877dac7d00bd096d5601fdcfbeea75e41fc))

##### Documentation

-   corrected the Dataflow job name regex ([#&#8203;190](https://togithub.com/googleapis/java-dataflow/issues/190)) ([8fbc2f0](https://togithub.com/googleapis/java-dataflow/commit/8fbc2f0160dfaa95ad2b4244fab8d20e1a819eaa))

### [`v0.6.1`](https://togithub.com/googleapis/java-dataflow/blob/HEAD/CHANGELOG.md#&#8203;061-httpsgithubcomgoogleapisjava-dataflowcomparev060v061-2022-06-23)

[Compare Source](https://togithub.com/googleapis/java-dataflow/compare/v0.6.0...v0.6.1)

##### Dependencies

-   update dependency com.google.cloud:google-cloud-shared-dependencies to v2.13.0 ([#&#8203;181](https://togithub.com/googleapis/java-dataflow/issues/181)) ([bc949a7](https://togithub.com/googleapis/java-dataflow/commit/bc949a7c7d7232506466fc41c5acafd5592ff223))

</details>

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Author: renovate-bot

bigtable/beam/workload-generator/pom.xml

@@ -116,7 +116,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-dataflow</artifactId>
-      <version>0.6.0</version>
+      <version>0.7.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>