Config: Port AutoUpdate settings to new config system.

[AdmiralCurtiss]

I took the opportunity to do pass some data to AutoUpdateChecker::CheckForUpdate() so we don't have to do the weird set-call-revert thing in InstallUpdateManually().

[AdmiralCurtiss]

(Also this is untested because I have no idea how to test this...)

[SupervisedThinking]

Well this PR leads to instant segfaults for my dolphin build 🤔 while de91afaff31df5a8075527196aa1de84bc133bc3 works fine

Reading symbols from ./dolphin-emu...
(gdb) run
Starting program: /storage/dolphin-emu 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007f73f8b6570b in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&) () from /usr/lib/libstdc++.so.6
(gdb) backtrace full
#0  0x00007f73f8b6570b in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&) () from /usr/lib/libstdc++.so.6
No symbol table info available.
#1  0x0000000000565d80 in Config::Info<std::string>::Info (this=0xd63ce0 <Config::MAIN_AUTOUPDATE_UPDATE_TRACK>, location=..., default_value=...)
    at /build/LibreELEC-RR/build.LibreELEC-x11.x86_64-11.0-devel/build/dolphin-1112b2a19e3421cb90364769754570c44f81d1ab/Source/Core/Common/Config/ConfigInfo.h:47
No locals.
#2  0x000000000044b668 in __static_initialization_and_destruction_0 (__priority=65535, __initialize_p=1)
    at /build/LibreELEC-RR/build.LibreELEC-x11.x86_64-11.0-devel/toolchain/x86_64-libreelec-linux-gnu/include/c++/10.3.0/ext/new_allocator.h:79
No locals.
#3  0x000000000099aaf5 in __libc_csu_init (argc=argc@entry=1, argv=argv@entry=0x7ffd30a02ff8, envp=0x7ffd30a03008) at elf-init.c:89
        i = 12
        size = 169
#4  0x00007f73f87afd7a in __libc_start_main (main=0x443e93 <main(int, char**)>, argc=1, argv=0x7ffd30a02ff8, init=0x99aab0 <__libc_csu_init>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7ffd30a02fe8) at ../csu/libc-start.c:270
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140136177575232, 140136175966240, 140136177575232, 140136066865673, 140136177392280, 1, 140725419257848, 
                140725419257864}, mask_was_saved = -15541600}}, priv = {pad = {0x7f73ff16e15e <call_init+158>, 0x0, 0x1, 0x7ffd30a02ff8}, data = {
              prev = 0x7f73ff16e15e <call_init+158>, cleanup = 0x0, canceltype = 1}}}
        not_first_call = <optimized out>
#5  0x000000000045d7fa in _start () at ../sysdeps/x86_64/start.S:120
No locals.

[leoetlino]

#10370 should fix that issue.