chore(csharp): bump hiveserver2 submodule for empty table-types GetTables fix

Updates csharp/hiveserver2 a8ad1e4 -> fe2d4ff (latest hiveserver2 main),
pulling adbc-drivers/hiveserver2#72 "correctly handle empty table types filter
on GetTables" (an empty `types:[]` is now treated like null = match all,
closing hiveserver2#69) plus the intervening chore/dependency bumps on main.

This is the Thrift-side half of the GetTables types-filter parity issue: the
filtering logic lives in the vendored hiveserver2 base, so it could not be fixed
in this repo directly (it was recorded out-of-scope on the SEA-side fix).

Co-authored-by: Isaac

Author: eric-wang-1990