refactor: add mget_id_value_compat() #16425
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`mget_id_value_compat([names])` fetch a list of `name->id->value` from meta-service with exact 2 mget() operations. This method can be used to optimize batch get operations. For example to get a list of `(DatabaseNameIdent, DatabaseId, DatabaseMeta)`. This method requires the id type to be a `Id<xxxId>` type. - Part of databendlabs#16421
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Summary
refactor: add mget_id_value_compat()
mget_id_value_compat([names])fetch a list ofname->id->valuefrommeta-service with exact 2 mget() operations.
This method can be used to optimize batch get operations. For example to
get a list of
(DatabaseNameIdent, DatabaseId, DatabaseMeta).This method requires the id type to be a
Id<xxxId>type.Tests
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