[lldb][FreeBSD] Add dynamic loader handle class for FreeBSD Kernel (#67106)

The implemtation support parsing kernel module for FreeBSD Kernel and
has been test on x86-64 and arm64.
In summary, this class parse the linked list resides in the kernel
memory that record all kernel module and load the debug symbol file to
facilitate debug process

Author: aokblast

lldb/source/Plugins/DynamicLoader/CMakeLists.txt

@@ -1,4 +1,5 @@
 add_subdirectory(Darwin-Kernel)
+add_subdirectory(FreeBSD-Kernel)
 add_subdirectory(MacOSX-DYLD)
 add_subdirectory(POSIX-DYLD)
 add_subdirectory(Static)

lldb/source/Plugins/DynamicLoader/FreeBSD-Kernel/CMakeLists.txt

@@ -0,0 +1,13 @@
+add_lldb_library(lldbPluginDynamicLoaderFreeBSDKernel PLUGIN
+  DynamicLoaderFreeBSDKernel.cpp
+
+  LINK_LIBS
+    lldbBreakpoint
+    lldbCore
+    lldbHost
+    lldbInterpreter
+    lldbSymbol
+    lldbTarget
+    lldbUtility
+    lldbPluginObjectFileELF
+  )