syscalls: dereferencing syscall argument pointers, parsers for argument values (modified pr #1824)

[psolvx]

Modified idea from #1824 by @1ndahous3, so most of that pr is included, with some changes.

fill_fmt_args uses parsers specified by:

• syscall name and argument name
• argument name
• argument type

Subkeys from #1850 are used to have a "Arguments" and "Extra" subkeys. Parsers can modify output argument values or add data to "Extra" subkey.

There are 2 boolean options:
--syscall-nested-args - controls if arguments are nested in an "Arguments" subkey
--syscall-dereference-args - controls if argument pointers are dereferenced and enables extra parsers (the goal was for the default setting to leave only parsers corresponding to previous parse_argument and win_extract_string functions, its up to each parser to respect that)

With both of these flags disabled output format should be backwards compatible

New parsers allow for reading:

• PID from ProcessHandle,
• TID, PID from ThreadHandle,
• rip, rcx from NtSetContextThread Context argument
• eip, eax from NtSetInformationThread Wow64Context argument

This pr is based on #1850 and also #1851 (though this one is not strictly necessary)

[drakvuf-jenkins]

Can one of the admins verify this patch?

[psolvx]

This is another approach I tried, where instead of a runtime argument parser lookup a pointer to the parser is added to arg_t at plugin initialization.

Complexity diff is from:

< Complex function found: ../src/plugins/syscalls/win.cpp: trap_syscall_table_entries(), complexity score: 52
> Complex function found: ../src/plugins/syscalls/win.cpp: trap_syscall_table_entries(), complexity score: 54

which I don't know how to easily refactor