[Feature] Support Paimon system tables #48279

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Description

1. Support querying system tables via '$', like:

select * from [catalog.][db.]table$system_table;

The system tables that need to be supported include:

• ro
• snapshots (replace with 'iceberg_meta')
• files
• manifests
• tags
• branches
• partitions

2. These system tables also support timestamp travel queries, like:

select * from [catalog.][db.]table$partitions VERSION AS OF 10963874102873

Use case

No response

Related issues

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Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct