deps: update dependency com.google.cloud:google-cloud-shared-dependencies to v2.12.0 (#1256)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-shared-dependencies](https://togithub.com/googleapis/java-shared-dependencies) | `2.11.0` -> `2.12.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-dependencies/2.12.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-dependencies/2.12.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-dependencies/2.12.0/compatibility-slim/2.11.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-shared-dependencies/2.12.0/confidence-slim/2.11.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-shared-dependencies</summary>

### [`v2.12.0`](https://togithub.com/googleapis/java-shared-dependencies/blob/HEAD/CHANGELOG.md#&#8203;2120-httpsgithubcomgoogleapisjava-shared-dependenciescomparev2110v2120-2022-05-19)

[Compare Source](https://togithub.com/googleapis/java-shared-dependencies/compare/v2.11.0...v2.12.0)

##### Features

-   add build scripts for native image testing in Java 17 ([#&#8203;1440](https://togithub.com/googleapis/java-shared-dependencies/issues/1440)) ([#&#8203;697](https://togithub.com/googleapis/java-shared-dependencies/issues/697)) ([f10ec4e](https://togithub.com/googleapis/java-shared-dependencies/commit/f10ec4e664d8fde868effe366b7182a5fad08dd0))

##### Dependencies

-   update gax.version to v2.18.1 ([#&#8203;695](https://togithub.com/googleapis/java-shared-dependencies/issues/695)) ([09bc61c](https://togithub.com/googleapis/java-shared-dependencies/commit/09bc61c9152a99bfe87554a07324f15ae6217d6e))
-   update google.core.version to v2.7.1 ([#&#8203;698](https://togithub.com/googleapis/java-shared-dependencies/issues/698)) ([43de259](https://togithub.com/googleapis/java-shared-dependencies/commit/43de2593f1a6e8fa5e34799364ab683246ddd449))

</details>

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Author: renovate-bot

google-cloud-bigtable-deps-bom/pom.xml

@@ -65,7 +65,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-dependencies</artifactId>
-        <version>2.11.0</version>
+        <version>2.12.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>