Revert "[lldb] [gdb-remote client] Refactor handling qSupported"

This reverts commit 3842de49f6551f597b4c7c78caa8ba7003755cec.

It fails to build, with errors such as:
  GDBRemoteCommunicationClient.cpp:1005:20:
  error: no viable overloaded '='
          avail_name = compression;

GitOrigin-RevId: 6c4f2508e4278ac789230cb05f2bb56a8a7297dc
2 files changed