[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>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/input_common/main.h b/src/input_common/main.h
index d0e447ec2d..3b33ef30eb 100644
--- a/src/input_common/main.h
+++ b/src/input_common/main.h
@@ -8,7 +8,7 @@
 
 #include <memory>
 #include <string>
-#include <ankerl/unordered_dense.h>
+#include "common/container/unordered_map.h"
 #include <vector>
 
 namespace Common {
@@ -56,9 +56,9 @@ enum class InputType { None, Button, Stick, Motion, Touch };
  * Given a ParamPackage for a Device returned from `GetInputDevices`, attempt to get the default
  * mapping for the device.
  */
-using AnalogMapping = ankerl::unordered_dense::map<Settings::NativeAnalog::Values, Common::ParamPackage>;
-using ButtonMapping = ankerl::unordered_dense::map<Settings::NativeButton::Values, Common::ParamPackage>;
-using MotionMapping = ankerl::unordered_dense::map<Settings::NativeMotion::Values, Common::ParamPackage>;
+using AnalogMapping = ::Common::unordered_map<Settings::NativeAnalog::Values, Common::ParamPackage>;
+using ButtonMapping = ::Common::unordered_map<Settings::NativeButton::Values, Common::ParamPackage>;
+using MotionMapping = ::Common::unordered_map<Settings::NativeMotion::Values, Common::ParamPackage>;
 
 class InputSubsystem {
 public: