AlluxioHelper bug causes cache miss

[coderwf]

There may be a bug in Method putBuffer of AlluxioInputHelper，as shown bellow：

IF the method seek(pos) was called in AlluxioInputStream, assume pos is 1000，and the fileLength is 110，position is 1000，then the bytesToReadInPage and bytesRead is 100, bufferEndPosition will be 100 if this is a first page, bufferStartPosition is 0.
it means this buffer cached the data position 0, 100，it will cause a cache miss in outer next method doBufferRead：

so the var bytesToReadInPage in method putBuffer shoud be :
long start = pageOffset + (pageId.getPageIndex() * pageSize);
int bytesToReadInPage = Ints.saturatedCast(min(pageSize - pageOffset, fileLength - start));

[coderwf]

@jkylling

[jkylling]

@coderwf thanks for the report! Are you able to provide a test case for this? One of the tests in https://github.com/trinodb/trino/blob/232916b75d415a5eb643cf922492eb8513d99aae/lib/trino-filesystem-cache-alluxio/src/test/java/io/trino/filesystem/alluxio/TestAlluxioCacheFileSystemAccessOperations.java could be adapted to catch this.

[coderwf]

@jkylling ok

[coderwf]

#23175 PR For this issue，please take a look @jkylling