fix: Refactor package namespace in HdfsFileSystem #14999

Job	Run time
Build	59m 4s
Build with Clang	0s
Spark Aggregate Fuzzer	15m 48s
Exchange Fuzzer	15m 55s
Presto Bias Fuzzer	0s
Aggregation Fuzzer with Presto as source of truth	29m 58s
Presto Fuzzer	15m 45s
Join Fuzzer	17m 26s
Window Fuzzer with Presto as source of truth	17m 31s
RowNumber Fuzzer	15m 38s
Spark Bias Fuzzer	0s
Spark Fuzzer	16m 4s
Signature Changes	3s
Biased Aggregation Fuzzer with Presto as source of truth	0s
Biased Expression Fuzzer with Only Added/Updated Functions and Presto as source of truth	0s
Writer Fuzzer with Presto as source of truth	17m 24s
	3h 40m 36s

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