Valkey-9 MultiDB support

[alexr-bq]

• Adds support for database ID with cluster client
• Moves Move/Copy commands from standalone to shared client

[yipin-chen]

@alexr-bq You also need to add the support for select command. Please review issue 4810. Thanks

[affonsov]

It's missing the select command, which is basically reverting this pr for the select #70. The only difference is that select should only be available for standalone batch and not cluster batch

[alexr-bq]

It's missing the select command, which is basically reverting this pr for the select #70. The only difference is that select should only be available for standalone batch and not cluster batch

It seems like Select functionality is already in. Pushed a commit that removes it from cluster batch.