[MINOR] fix the error message for glue sync tool

[prabodh1194]

Change Logs

When I tried using GLUE mode for syncing meta, I kept getting an error about entering an incorrect mode. I realised a but later that my --sync-tool-classes setting was not pointing to org.apache.hudi.aws.sync.AwsGlueCatalogSyncTool. A better error message will go a long way in improve developer experience in this regard.

Impact

Better error message. No public impact.

Risk level (write none, low medium or high below)

none.

Documentation Update

"none"

Contributor's checklist

• [x] Read through contributor's guide
• [x] Change Logs and Impact were stated clearly
• [x] Adequate tests were added if applicable
• [x] CI passed