DRILL-7911 Disable maven-surefire-plugin for Splunk for ARM Build (#2218)
* DRILL-7911 Disable maven-surefire-plugin for Splunk
Disable running the unit tests for Contrib Storage Splunk for Linux ARM64 because there is no Docker image for splunk/splunk
* DRILL-7911 Disable unit tests for all CPU architectures but x86_64