libunifex: migrate to Conan v2

[valgur]

Requires

• liburing: Add 2.3+2.4 and update to Conan 2 #21061

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Ahajha]

I think this might somehow be pulling a system liburing. In liburing 0.1, neither IORING_OP_ACCEPT nor IORING_OP_TIMEOUT was defined, in 0.2 they were both defined, but from this commit it seems there was a brief period of time where only the latter was.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 17 (f031017bb4f01d4a69fdca7facc58a6c5322c7f5):

• libunifex/0.4.0:
  All packages built successfully! (All logs)

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Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 16 (f031017bb4f01d4a69fdca7facc58a6c5322c7f5):

• libunifex/0.4.0:
  All packages built successfully! (All logs)