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Support local-cache extension exclusions #971

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@XiaoHongbo-Hope

Allow data files to use the local block cache while excluding specified extensions, such as BLOB value bodies:

local-cache.whitelist=meta,global-index,data
local-cache.exclude-extensions=blob

The exclusion is optional. Existing data behavior stays unchanged when it is empty. Cache format and source file formats are unchanged.

Related Python implementation: apache/paimon#10225

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