shader_cache: Fix use-after-free and orphan invalidation cache entries

GC Adapter Implementation

externals: Track opus as submodule instead of using conan

gl_buffer_cache: Copy to buffers created as STREAM_READ before downloading

Implement GetKeyCodeMap & GetKeyCodeMap2

Revert "cmake: fix fmt linking"

cmake: fix fmt linking

am: Stub GetIndirectLayerConsumerHandle

acc: ListOpenContextStoredUsers partial stub

Add LR triggers as axes, half press to initiate a press, add GC axis id in config, clarify some code blocks for better readability

maxwell_to_gl: Implement MirrorOnceClampOGL wrap mode using GL_MIRROR_CLAMP_EXT

This fixes some cases where entries could have been removed multiple
times reading freed memory. To address this issue this commit removes
duplicates from entries marked for removal and sorts out the removal
process to fix another use-after-free situation.

Another issue fixed in this commit is orphan invalidation cache entries.
Previously only the entries that were invalidated in the current
operations had its entries removed. This led to more use-after-free
situations when these entries were actually invalidated but referenced
an object that didn't exist.

key_manager: Make use of canonical deleted operator=

Supersedes #4068 see for details.

common: unbreak build on BSDs

Our codebase uppercases member function names.

cmake: unbreak YUZU_USE_QT_WEB_ENGINE without YUZU_USE_BUNDLED_QT

Prevents the singleton from being moved from.

operator= typically returns a reference, it's not void.

While we're at it, we can correct the parameter formatting to adhere to the
codebase.

crypto: Make KeyManager a singleton class

prepo: : Don't read extra buffer from report unless passed

Add game version to window title

Add "Open Quickstart Guide" and "FAQ" buttons to the Help menu

texture_cache: Check format compatibility before copying

gl_device: Enable NV_vertex_buffer_unified_memory on Turing devices

Like MirrorOnceBorder, this requires the GL_EXT_texture_mirror_clamp extension. This extension is unfortunately not available on Intel's drivers (both Windows proprietary and Linux Mesa). Use GL_MIRROR_CLAMP_TO_EDGE as a fallback if the extension is unavailable.

maxwell_to_gl/vk: Reorder vertex formats

Macro code is just uploaded sequentially from a starting address, however that does not mean the entry point for the macro is at that address. This PR adds preliminary support for executing macros in the middle of our cached code.

hotkeys: Fix issues caused when changing the fullscreen hotkey

CMake Error at src/yuzu/CMakeLists.txt:7 (add_executable):
  Target "yuzu" links to target "Qt5::WebEngineCore" but the target was not
  found.  Perhaps a find_package() call is missing for an IMPORTED target, or
  an ALIAS target is missing?