[common] Switch to boost::unordered_flat containers (#4326)

Replaces all instances of ankerl's unordered map/set with boost's
`unordered_flat_*` classes. This uses std::hash since boost::hash is
actually a lot slower.

Also adds an abstraction layer in `Common` so future changes are quicker
and easier.

Other implementation details:
- ankerl provided hash specializations for tuple and pair, so those were
  ported here
- std::erase_if doesn't work on boost, so just used the ADL'd erase_if

This should be about equal or superior performance as unordered_dense for everything except iteration.

Signed-off-by: crueter <crueter@eden-emu.dev>

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4326
Reviewed-by: Lizzie and Samuel <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

src/core/hle/service/nvdrv/core/container.h

@@ -9,7 +9,7 @@
 
 #include <deque>
 #include <memory>
-#include <ankerl/unordered_dense.h>
+#include "common/container/unordered_map.h"
 
 #include "core/device_memory_manager.h"
 #include "core/hle/service/nvdrv/nvdata.h"

src/core/hle/service/nvdrv/core/nvmap.h

@@ -12,7 +12,7 @@
 #include <memory>
 #include <mutex>
 #include <optional>
-#include <ankerl/unordered_dense.h>
+#include "common/container/unordered_map.h"
 #include <assert.h>
 
 #include "common/bit_field.h"
@@ -161,7 +161,7 @@ private:
     std::list<std::shared_ptr<Handle>> unmap_queue{};
     std::mutex unmap_queue_lock{}; //!< Protects access to `unmap_queue`
 
-    ankerl::unordered_dense::map<Handle::Id, std::shared_ptr<Handle>>
+    ::Common::unordered_map<Handle::Id, std::shared_ptr<Handle>>
         handles{};           //!< Main owning map of handles
     std::mutex handles_lock; //!< Protects access to `handles`
 

src/core/hle/service/nvdrv/devices/nvhost_as_gpu.h

@@ -13,7 +13,7 @@
 #include <memory>
 #include <mutex>
 #include <optional>
-#include <ankerl/unordered_dense.h>
+#include "common/container/unordered_set.h"
 #include <vector>
 
 #include "common/address_space.h"
@@ -113,7 +113,7 @@ private:
     };
     static_assert(sizeof(IoctlRemapEntry) == 20, "IoctlRemapEntry is incorrect size");
 
-    ankerl::unordered_dense::set<s64_le> map_buffer_offsets{};
+    ::Common::unordered_set<s64_le> map_buffer_offsets{};
 
     struct IoctlMapBufferEx {
         MappingFlags flags{}; // bit0: fixed_offset, bit2: cacheable

src/core/hle/service/nvdrv/devices/nvhost_gpu.h

@@ -217,7 +217,7 @@ private:
     NvCore::SyncpointManager& syncpoint_manager;
     NvCore::NvMap& nvmap;
     std::shared_ptr<Tegra::Control::ChannelState> channel_state;
-    ankerl::unordered_dense::map<DeviceFD, NvCore::SessionId> sessions;
+    ::Common::unordered_map<DeviceFD, NvCore::SessionId> sessions;
     u32 channel_syncpoint;
     std::mutex channel_mutex;
 

src/core/hle/service/nvdrv/devices/nvhost_nvdec_common.h

@@ -7,7 +7,7 @@
 #pragma once
 
 #include <deque>
-#include <ankerl/unordered_dense.h>
+#include "common/container/unordered_map.h"
 #include <vector>
 
 #include "common/common_types.h"
@@ -138,7 +138,7 @@ protected:
     NvCore::NvMap& nvmap;
     NvCore::ChannelType channel_type;
     std::array<u32, MaxSyncPoints> device_syncpoints{};
-    ankerl::unordered_dense::map<DeviceFD, NvCore::SessionId> sessions;
+    ::Common::unordered_map<DeviceFD, NvCore::SessionId> sessions;
 };
 }; // namespace Devices
 } // namespace Service::Nvidia

src/core/hle/service/nvdrv/devices/nvmap.h

@@ -7,7 +7,7 @@
 #pragma once
 
 #include <memory>
-#include <ankerl/unordered_dense.h>
+#include "common/container/unordered_map.h"
 #include <vector>
 #include "common/common_funcs.h"
 #include "common/common_types.h"
@@ -118,7 +118,7 @@ private:
 
     NvCore::Container& container;
     NvCore::NvMap& file;
-    ankerl::unordered_dense::map<DeviceFD, NvCore::SessionId> sessions;
+    ::Common::unordered_map<DeviceFD, NvCore::SessionId> sessions;
 };
 
 } // namespace Service::Nvidia::Devices

src/core/hle/service/nvdrv/nvdrv.h

@@ -12,7 +12,7 @@
 #include <memory>
 #include <span>
 #include <string>
-#include <ankerl/unordered_dense.h>
+#include "common/container/unordered_map.h"
 
 #include "common/common_types.h"
 #include "core/hle/service/kernel_helpers.h"
@@ -103,7 +103,7 @@ private:
     /// Id to use for the next open file descriptor.
     DeviceFD next_fd = 1;
 
-    using FilesContainerType = ankerl::unordered_dense::map<DeviceFD, std::shared_ptr<Devices::nvdevice>>;
+    using FilesContainerType = ::Common::unordered_map<DeviceFD, std::shared_ptr<Devices::nvdevice>>;
     /// Mapping of file descriptors to the devices they reference.
     FilesContainerType open_files;
 
@@ -111,7 +111,7 @@ private:
 
     EventInterface events_interface;
 
-    ankerl::unordered_dense::map<std::string, std::function<FilesContainerType::iterator(DeviceFD)>> builders;
+    ::Common::unordered_map<std::string, std::function<FilesContainerType::iterator(DeviceFD)>> builders;
 };
 
 void LoopProcess(Core::System& system);