Allow /opt/pkb/hbase to exist before installation.
Allow /opt/pkb/hbase to exist before installation.

PiperOrigin-RevId: 419841270

GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker