nativeGen/dwarf: Fix procedure end addresses

Previously the .debug_aranges and .debug_info (DIE) DWARF information would claim that procedures (represented with a DW_TAG_subprogram DIE) would only span the range covered by their entry block. This omitted all of the continuation blocks (represented by DW_TAG_lexical_block DIEs), confusing perf. Fix this by introducing a end-of-procedure label and using this as the DW_AT_high_pc of procedure DW_TAG_subprogram DIEs

Fixes #17605 (closed).

Additionally fix two smaller issues:

• Generate DW_TAG_source_note nodes only with -g3
• Use the DW_AT_linkage_name attribute instead of DW_AT_MIPS_linkage_name (it's unclear why this was used originally)