deps: update dependency com.google.cloud:google-cloud-core to v2.8.0 (googleapis#939)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-core](https://togithub.com/googleapis/java-core) | `2.7.1` -> `2.8.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.0/compatibility-slim/2.7.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-core/2.8.0/confidence-slim/2.7.1)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v2.8.0`](https://togithub.com/googleapis/java-core/blob/HEAD/CHANGELOG.md#&#8203;280-httpsgithubcomgoogleapisjava-corecomparev271v280-2022-06-21)

[Compare Source](https://togithub.com/googleapis/java-core/compare/v2.7.1...v2.8.0)

##### Features

-   add build scripts for native image testing in Java 17 ([#&googleapis#8203;1440](https://togithub.com/googleapis/java-core/issues/1440)) ([#&googleapis#8203;836](https://togithub.com/googleapis/java-core/issues/836)) ([8826d9b](https://togithub.com/googleapis/java-core/commit/8826d9bc05eb9e4a54c40e8578de85ed79c50e99))

##### Dependencies

-   update dependency com.google.api-client:google-api-client-bom to v1.35.1 ([#&googleapis#8203;843](https://togithub.com/googleapis/java-core/issues/843)) ([9ffe0c5](https://togithub.com/googleapis/java-core/commit/9ffe0c5b25761abf7ff1bea091aa1db057dff2d0))
-   update dependency com.google.api:api-common to v2.2.1 ([#&googleapis#8203;844](https://togithub.com/googleapis/java-core/issues/844)) ([69dde56](https://togithub.com/googleapis/java-core/commit/69dde5641546b678a385b1ed3a2c7a020f81d285))
-   update dependency com.google.api:gax-bom to v2.18.2 ([#&googleapis#8203;849](https://togithub.com/googleapis/java-core/issues/849)) ([11764b0](https://togithub.com/googleapis/java-core/commit/11764b04629c5bfbc9b0d68174782cc126dc1646))
-   update dependency com.google.api.grpc:proto-google-common-protos to v2.9.0 ([#&googleapis#8203;846](https://togithub.com/googleapis/java-core/issues/846)) ([5dced6d](https://togithub.com/googleapis/java-core/commit/5dced6d25ce0f3e7587d7ac1f6f3713f3b2a18c2))
-   update dependency com.google.api.grpc:proto-google-iam-v1 to v1.4.0 ([#&googleapis#8203;838](https://togithub.com/googleapis/java-core/issues/838)) ([b0a7afe](https://togithub.com/googleapis/java-core/commit/b0a7afe342a5e15436d439b9cc1e3c58f894ab66))
-   update dependency com.google.api.grpc:proto-google-iam-v1 to v1.4.1 ([#&googleapis#8203;848](https://togithub.com/googleapis/java-core/issues/848)) ([8260997](https://togithub.com/googleapis/java-core/commit/826099767b0aabe0db26eff2f612f0847b451366))
-   update dependency com.google.errorprone:error_prone_annotations to v2.14.0 ([#&googleapis#8203;839](https://togithub.com/googleapis/java-core/issues/839)) ([3459fb6](https://togithub.com/googleapis/java-core/commit/3459fb668557b982cef5682ce47d3c978b83d69c))
-   update dependency com.google.http-client:google-http-client-bom to v1.42.0 ([#&googleapis#8203;845](https://togithub.com/googleapis/java-core/issues/845)) ([2d2c873](https://togithub.com/googleapis/java-core/commit/2d2c873e274b26f4687d569cc3b8ae58c3c5ed54))
-   update dependency com.google.protobuf:protobuf-bom to v3.21.0 ([#&googleapis#8203;840](https://togithub.com/googleapis/java-core/issues/840)) ([037da15](https://togithub.com/googleapis/java-core/commit/037da15b2aed1719e768ba5b4e001caf25952adc))
-   update dependency com.google.protobuf:protobuf-bom to v3.21.1 ([#&googleapis#8203;841](https://togithub.com/googleapis/java-core/issues/841)) ([04b8862](https://togithub.com/googleapis/java-core/commit/04b886224128f1525ad8398815dc62dac87680af))
-   update dependency io.grpc:grpc-bom to v1.47.0 ([#&googleapis#8203;842](https://togithub.com/googleapis/java-core/issues/842)) ([40984e2](https://togithub.com/googleapis/java-core/commit/40984e23242ba954b6ca741ca3f02ec89e92ae57))

##### [2.7.1](https://togithub.com/googleapis/java-core/compare/v2.7.0...v2.7.1) (2022-05-19)

##### Dependencies

-   update dependency com.google.api:gax-bom to v2.18.1 ([#&googleapis#8203;833](https://togithub.com/googleapis/java-core/issues/833)) ([7541115](https://togithub.com/googleapis/java-core/commit/7541115095e0ae28d938a4c9621fd0f82892fe55))

</details>

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Author: renovate-bot

java-dialogflow/samples/install-without-bom/pom.xml

@@ -36,7 +36,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.7.1</version>
+      <version>2.8.0</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>

java-dialogflow/samples/snapshot/pom.xml

@@ -34,7 +34,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.7.1</version>
+      <version>2.8.0</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>

java-dialogflow/samples/snippets/pom.xml

@@ -47,7 +47,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-core</artifactId>
-      <version>2.7.1</version>
+      <version>2.8.0</version>
       <scope>test</scope>
       <classifier>tests</classifier>
     </dependency>