metall: add version 0.28

[toge]

Specify library name and version: metall/0.28

LLNL/metall@v0.27...v0.28

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• I've read the contributing guidelines.
• I've used a recent Conan client version close to the currently deployed.
• I've tried at least one configuration locally with the conan-center hook activated.

[bigerl]

I would like to push this PR back to attention. It looks like it is ready to be merged and only missing one review.
We really need it and would like to avoid hosting the package version by our selves. @Clueliss from our team also started a PR #23984 but closed it in favor of this one.

If there is anything we can do to help please let us know.

edit: @RubenRBS, I hope I may poke you about this as you self-assigned yourself the review.

[AbrilRBS]

Thanks!

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 5 (8ea5830e4a5e6f72fe13d940e8c14780f4f65f0c):

• metall/0.27:
  All packages built successfully! (All logs)

• metall/0.28:
  All packages built successfully! (All logs)

• metall/0.26:
  All packages built successfully! (All logs)

• metall/0.25:
  All packages built successfully! (All logs)

• metall/0.24:
  All packages built successfully! (All logs)

• metall/0.23.1:
  All packages built successfully! (All logs)

• metall/0.20:
  All packages built successfully! (All logs)

• metall/0.21:
  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 5 (8ea5830e4a5e6f72fe13d940e8c14780f4f65f0c):

• metall/0.28:
  All packages built successfully! (All logs)

• metall/0.27:
  All packages built successfully! (All logs)

• metall/0.26:
  All packages built successfully! (All logs)

• metall/0.25:
  All packages built successfully! (All logs)

• metall/0.24:
  All packages built successfully! (All logs)

• metall/0.21:
  All packages built successfully! (All logs)

• metall/0.20:
  All packages built successfully! (All logs)

• metall/0.23.1:
  All packages built successfully! (All logs)