Support iceberg external table

[caneGuy]

Enhancement

More and more users are using external table of starrocks, and some users use iceberg to build a lakehouse platform. We can support the iceberg table as an external table, and then we can use starrocks to analyze the iceberg table. This is a parent issue for iceberg table. We will add TODOs to this issue. TODOs:

• [x] Iceberg table design document Design doc
• [x] Support iceberg on HDFS #2225
• [x] Support iceberg on OSS
• [x] Support hive catalog for iceberg #2225
• [ ] Support hadoop catalog for iceberg #3453
• [x] Table statistics for planner CBO #2805
• [ ] TimeTravel grammar support #3451
• [x] Metadata cache #3497
• [ ] Support Avro reader for iceberg
• [ ] Support iceberg v2 format #3452
• [x] Support scan column prune #2871
• [x] Support predicate pushdown #2792
• [x] Support join reorder #3496
• [ ] Support custom catalog #3826

cc @miomiocat @Ielihs

[caneGuy]

I wrote a draft for 'support query iceberg table', PTAL!Looking forward to your suggestions cc @miomiocat @Ielihs

[github-actions[bot]]

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