glib: add v2.80.0

[valgur]

Continues from #23193. Related to #23557 and conan-io/conan-docker-tools#554 (comment)

Adds self.tool_requires("cpython/3.12.2") and installs a pinned version of packaging from PyPI locally into the build folder.

The published package artifacts on PyPI are immutable, so the pinned version will provide reproducible builds and is reflected in the package hash via the conanfile.py contents, if I'm not mistaken.

I think this approach is a simple and scalable way to deal with build-scope Python dependencies on CCI in general.

Edit: @ericLemanissier pointed out to me that the packaging dependency is a transitive build dep. Since we decided not to package it separately, the only option left was to vendor the two required files. Which I did.

[ericLemanissier]

The build is now finished. You can take a look at the results here

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 4 (d94cbd4fccf490f9b2225e4dfb6d8b432a00f620):

• glib/2.80.0:
  All packages built successfully! (All logs)

• glib/2.78.3:
  All packages built successfully! (All logs)

• glib/2.78.1:
  All packages built successfully! (All logs)

• glib/2.77.1:
  All packages built successfully! (All logs)

• glib/2.78.0:
  All packages built successfully! (All logs)

• glib/2.77.3:
  All packages built successfully! (All logs)

• glib/2.77.2:
  All packages built successfully! (All logs)

• glib/2.77.0:
  All packages built successfully! (All logs)

• glib/2.76.3:
  All packages built successfully! (All logs)

• glib/2.75.3:
  All packages built successfully! (All logs)

---

Conan v2 pipeline ✔️

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

All green in build 4 (d94cbd4fccf490f9b2225e4dfb6d8b432a00f620):

• glib/2.80.0:
  All packages built successfully! (All logs)

• glib/2.78.0:
  All packages built successfully! (All logs)

• glib/2.78.3:
  All packages built successfully! (All logs)

• glib/2.78.1:
  All packages built successfully! (All logs)

• glib/2.77.3:
  All packages built successfully! (All logs)

• glib/2.77.1:
  All packages built successfully! (All logs)

• glib/2.77.0:
  All packages built successfully! (All logs)

• glib/2.76.3:
  All packages built successfully! (All logs)

• glib/2.75.3:
  All packages built successfully! (All logs)

• glib/2.77.2:
  All packages built successfully! (All logs)

[ericLemanissier]

@memsharded @uilianries I think this PR is implementing the solution you had in mind in conan-io/conan-docker-tools#554 (comment)
Can we get a review in order to finally make progress ?

[valgur]

Closing as superseded by #24591. Most of the changes here were related to the Python 3.12 issues.