fix: bring back driver registration

[jcosentino11]

Issue #, if available:

Description of changes:
While passing in local unit/integration tests, #36 broke UATs due to driver not being registered.

java.io.IOException: java.sql.SQLException: No suitable driver found for jdbc:sqlite:/home/ec2-user/testResults/23a8fe84c2b77e4bcf9352b2925df0db9fd6d40b/work/aws.greengrass.DiskSpooler/spooler.db

This change brings back registration.

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[github-actions]

Unit Tests Coverage Report

File	Coverage	Lines	Branches
All files	91%	85%	97%	✅
com.aws.greengrass.disk.spool.DiskSpoolDAO$RemoveSpoolMessageById	100%	100%	0%	✅
com.aws.greengrass.disk.spool.DiskSpoolDAO$CachedStatement	94%	88%	100%	✅
com.aws.greengrass.disk.spool.DiskSpoolDAO$CreateSpoolerTable	100%	100%	0%	✅
com.aws.greengrass.disk.spool.DiskSpoolDAO$GetSpoolMessageById	100%	100%	100%	✅
com.aws.greengrass.disk.spool.DiskSpoolDAO	87%	83%	90%	✅
com.aws.greengrass.disk.spool.DiskSpoolDAO$GetSpoolMessageById$1	100%	100%	0%	✅
com.aws.greengrass.disk.spool.DiskSpool	61%	61%	0%	❌
com.aws.greengrass.disk.spool.DiskSpoolDAO$InsertSpoolMessage	97%	94%	100%	✅
com.aws.greengrass.disk.spool.DiskSpoolDAO$GetAllSpoolMessageIds	100%	100%	100%	✅

Minimum allowed coverage is 65%

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