chore(pypi): Better error message when platform is not supported for pypi project

[nichmor]

Having a pyproject.toml like this and running on osx-arm64

[project]
name = "test"
dependencies = ["tqdm @ https://github.com/tqdm/tqdm.git"]

[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

[tool.pixi.workspace]
channels = ["conda-forge"]
platforms = ["linux-64"]

[tool.pixi.dependencies]
numpy = "*"

will first WARN on an unsupported platform

 WARN Not installing dependency for (default) on current platform: (osx-arm64) as it is not part of this project's supported platforms.

But later, we will panic and error out.

▪ solving              [━━━━━━━━━━━━━━━━━━━━]  1/1                                                                                              
⠁ updating lock-file   [00:00:15] [━━━━━━━━━━━━━╾──────────────────────────]    1/3                                                             
  ⠚ default:linux-64     [00:00:00] resolving pypi dependencies                                                                                 
thread 'main2' panicked at /Users/graf/oss/pixi/crates/pixi_core/src/lock_file/resolve/build_dispatch.rs:439:17:
Error:   × failed to solve the pypi requirements of environment 'default' for platform 'linux-64'
  ╰─▶ build dispatch initialization failed: there is no compatible Python interpreter for 'osx-arm64'

I think we can take a look ahead, and nicely erorr out instead of panic