misc: fix issues pointed out by msvc (#7316)

* do not move constant variables

* applet_manager: avoid possible use after move

* use constant references where pointed out by msvc

* extra_hid: initialize response

* ValidateSaveState: passing slot separately is not necessary

* common: mark HashCombine as nodiscard

* cityhash: remove use of using namespace std

* Prefix all size_t with std::

done automatically by executing regex replace `([^:0-9a-zA-Z_])size_t([^0-9a-zA-Z_])` -> `$1std::size_t$2`
based on 7d8f115

* shared_memory.cpp: fix log error format

* fix compiling with pch off

src/video_core/shader/generator/glsl_fs_shader_gen.cpp

@@ -12,7 +12,7 @@ using ProcTexCombiner = TexturingRegs::ProcTexCombiner;
 using ProcTexFilter = TexturingRegs::ProcTexFilter;
 using TextureType = Pica::TexturingRegs::TextureConfig::TextureType;
 
-constexpr static size_t RESERVE_SIZE = 8 * 1024 * 1024;
+constexpr static std::size_t RESERVE_SIZE = 8 * 1024 * 1024;
 
 enum class Semantic : u32 {
     Position,

src/video_core/shader/shader.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <memory>
 #include "common/common_types.h"
 
 namespace Pica {

src/video_core/shader/shader_jit_a64_compiler.cpp

@@ -968,7 +968,7 @@ void JitShader::Compile(const std::array<u32, MAX_PROGRAM_CODE_LENGTH>* program_
     protect();
     invalidate_all();
 
-    const size_t code_size =
+    const std::size_t code_size =
         current_address() - reinterpret_cast<uintptr_t>(oaknut::CodeBlock::ptr());
 
     ASSERT_MSG(code_size <= MAX_SHADER_SIZE, "Compiled a shader that exceeds the allocated size!");