bcat: Silence various warnings

alignment: Resolve allocator construction issues on debug

This was related to the source allocator being passed into the
constructor potentially having a different type than allocator being
constructed.

We simply need to provide a constructor to handle this case.

This resolves issues related to the allocator causing debug builds on
MSVC to fail.

Allows containers and other data structures to consider optimizations
based off of them. We satisfy all of these requirements anyways.

gl_shader_disk_cache: Properly ignore existing cache

Previously old entries where appended to the file even if the shader
cache was ignored at boot. Address that issue.

We need to perform explicit casts here, otherwise we're implicitly
truncating a 64-bit type to a 32-bit one.

Without this, the std::move within the constructor initializer list
won't be able to actually perform a move.

Allows us to remove a constructor initializer list.

Given the string is appended to another, we can make it a view so a
redundant full copy of the string isn't made.

qt: Fix game name format error

This member function doesn't modify internal member state, so it can be
marked const.

On parse errors, we can log out the explanatory string indicating what
the parsing error was, rather than just ignoring the variable and
returning an overly broad error code.

Silence miscellaneous warnings

ci: Add custom titlebars for mainline and patreon

video_core/shader: Minor changes

These can inhibit the ability of a compiler to perform RVO.

Allows the function to be non-allocating in terms of the output string.

Same behavior, but without the need to heap allocate

This is behaviorally equivalent and also fixes a bug where some members
weren't being moved over.

Keeps them alphabetically sorted for readability.

Provides logical symmetry to the interface.

Avoids unnecessary atomic reference count increments and decrements.

Provides const equivalents of data accessors for use within const
contexts.

Shader_IR: Implement a full control flow decompiler for the shader IR.

TextureCache: Add the ability to deduce if two textures are depth on blit.