[lldb][Type Completion] Load C++ methods lazily from DWARF#8578

Michael137 merged 2 commits intoswiftlang:nextswiftlang/llvm-project:nextfrom

Michael137:lldb/type-completion-rework/lazy-method-loading-to-nextMichael137/llvm-project:lldb/type-completion-rework/lazy-method-loading-to-nextCopy head branch name to clipboard