build: Release Please to control tests module too (#4771)
build: Release Please to control tests module too (#4771)

Release Please updates the versions listed in the manifest only (Related: https://github.com/googleapis/release-please/issues/1453). The tests module is not touched by Release Please. This pull request attempts to include the module into the scope of Release Please

# The Problem to Solve

Because of this gap, currently the tests/dependency-convergence module fails when we create a new version:

```
[INFO] Scanning for projects...
Error: ] Some problems were encountered while processing the POMs:
Error:  5ebc86f20d01b08844ef9e82f2bc651d9b266bb9@ line 146, column 18
Error:  5ba37aa4b750d1ff3803efe918b69f2f7b565249@ line 150, column 18
Error:  bef662d20c01e90b142e8b6d19fc48ef96ac2d26@ line 285, column 17
 @ 
Error:  The build could not read 1 project -> [Help 1]
Error:    
Error:    The project com.google.cloud:full-convergence-check:0.174.0 (/home/runner/work/java-cloud-bom/java-cloud-bom/tests/dependency-convergence/pom.xml) has 3 errors
Error:      5ebc86f20d01b08844ef9e82f2bc651d9b266bb9@ line 146, column 18
Error:      5ba37aa4b750d1ff3803efe918b69f2f7b565249@ line 150, column 18
Error:      bef662d20c01e90b142e8b6d19fc48ef96ac2d26@ line 285, column 17
```

The error occurs in tests/dependency-convergence directory with `mvn -B -V -ntp validate`.

The google-cloud-bom version in the test pom.xml is not updated. https://github.com/googleapis/java-cloud-bom/blob/196198c62a720ff364e0b547c2f7a73783d884e5/tests/dependency-convergence/pom.xml#L26

It should have pointed to "0.175.0".
googleapis/java-cloud-bom,googleapis/java-cloud-bom,googleapis/java-cloud-bom,googleapis/java-cloud-bom