[lldb] Explicitly qualify calls to std::static_pointer_cast

Due to a c++ quirk, these are found through ADL only when a function with that
name is found through regular lookup. We have one such function in SharingPtr.h,
but I am trying to remove it.
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
index 12b05e7..83aca6a 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
@@ -3479,7 +3479,7 @@
           return error;
         } else
           options.setTraceParams(
-              static_pointer_cast<StructuredData::Dictionary>(
+              std::static_pointer_cast<StructuredData::Dictionary>(
                   custom_params_sp));
       }
     } else {
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
index 6a6e0d5..0bdad8b 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp
@@ -1072,7 +1072,7 @@
     return SendIllFormedResponse(packet, "jTraceStart: Ill formed packet ");
 
   options.setTraceParams(
-      static_pointer_cast<StructuredData::Dictionary>(custom_params_sp));
+      std::static_pointer_cast<StructuredData::Dictionary>(custom_params_sp));
 
   if (buffersize == std::numeric_limits<uint64_t>::max() ||
       type != lldb::TraceType::eTraceTypeProcessorTrace) {