Update to the latest MapLibre Native Core

[birkskyum]

Update to the latest version of MapLibre Core.

The current version has

• OpenGL v2

The latest version has

• OpenGL v3+
• Metal integration.
• Vulkan integration. (Optional, OpenGL v3+ support could suffice initially)

[ntadej]

Note that just updating the core will not bring Metal or Vulkan as additional work will be needed so until we have person-power to work on it and/or interest it may not be beneficial to rush with the update.

[birkskyum]

@ntadej , I'm trying to figure where we can find assistance on upgrading this. I understand that it's a larger undertaking, after all Native is now 1000+ commits ahead of the OpenGL2 branch. If you can help clarify as detailed as possible what needs to happen in this repo, I'd appreciate it.

[ntadej]

We need glue code like src/location/texture_node.cpp written for Metal and Vulkan.

Similarly we need a glue code for widgets if we want to keep feature parity.