[HOT-FIX][BUILD] Use the new location of `checkstyle-suppressions.xml`

## What changes were proposed in this pull request?

This PR fixes `dev/lint-java` and `mvn checkstyle:check` failures due the recent file location change.
The following is the error message of current master.
```
Checkstyle checks failed at following occurrences:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check (default-cli) on project spark-parent_2.11: Failed during checkstyle configuration: cannot initialize module SuppressionFilter - Cannot set property 'file' to 'checkstyle-suppressions.xml' in module SuppressionFilter: InvocationTargetException: Unable to find: checkstyle-suppressions.xml -> [Help 1]
```

## How was this patch tested?

Manual. The following command should run correctly.
```
./dev/lint-java
mvn checkstyle:check
```

Author: Dongjoon Hyun <dongjoon@apache.org>

Closes #11567 from dongjoon-hyun/hotfix_checkstyle_suppression.