[Linux][GDB-JIT] Add lexical scopes info for local variables (dotnet/coreclr#10307)

[Linux][GDB-JIT] Add lexical scopes info for local variables (dotnet/coreclr#10307)

* Fix memory leak when getting local variable names

* Pass locals from SymbolReader using new LocalVarInfo struct

* Map IL to native addresses for variable scopes

* Dump variables with scopes

* Add scope info to VarDebugInfo

* Remove unnecessary usage of lines info in BuildDebugInfo

* Use holders for scopes and local var names

* Move array of FunctionMember from global scope to local scope

* Move SymbolNames from global scope to local scope

Commit migrated from https://github.com/dotnet/coreclr/commit/a50348830471e9d821da525ed862e72e061b0766