[fix](cloud) fix read cache block file return stat NOT_FOUND (pick #43220) #43512
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pick #43220 pick #43220 pick #43220
Previously, cache blocks could be downloaded as different types than the target type we intended to read, leading to false cache misses. E.g., a block might be downloaded as an 'idx' type when the current context expected a 'ttl' type.
The root cause of this problem is the original design encoding meta info such as type and expiration time into cache block file path and readers of this cache block file have inconsistent view of the type so they use different name to locate file and run into error in the end.
This commit tries other type if the initial type failed to locate the file (return NOT_FOUND). Be ware that this is a nasty quick fix. We will elimite the metadate encoded in the file path in the near future to get rid of all the path related problems.
What problem does this PR solve?
Issue Number: close #xxx
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