build(deps): bump test-containers.version from 1.17.6 to 1.21.1 (#2388)

Bumps `test-containers.version` from 1.17.6 to 1.21.1.

Updates `org.testcontainers:testcontainers` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

Updates `org.testcontainers:mongodb` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

Updates `org.testcontainers:vault` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

Updates `org.testcontainers:localstack` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

Updates `org.testcontainers:oracle-xe` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

Updates `org.testcontainers:mysql` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

Updates `org.testcontainers:postgresql` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

Updates `org.testcontainers:mssqlserver` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

Updates `org.testcontainers:solr` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

Updates `org.testcontainers:elasticsearch` from 1.17.6 to 1.21.1
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.17.6...1.21.1)

---
updated-dependencies:
- dependency-name: org.testcontainers:testcontainers
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:mongodb
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:vault
  dependency-version: 1.21.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:localstack
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:oracle-xe
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:mysql
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:postgresql
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:mssqlserver
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:solr
  dependency-version: 1.21.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.testcontainers:elasticsearch
  dependency-version: 1.21.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -63,7 +63,7 @@ Integrates with Spring Data, Spring Data REST and Apache Solr</description>
         <elasticsearch-rest-high-level-client.version>7.17.28</elasticsearch-rest-high-level-client.version>
 
         <!-- Test dependencies -->
-        <test-containers.version>1.17.6</test-containers.version>
+        <test-containers.version>1.21.1</test-containers.version>
         <mockito.version>3.12.4</mockito.version>
 
         <docs.output.dir>../target/generated-docs/refs/${env.BUILD_TYPE}/</docs.output.dir>