8 packages from ocaml/opam at 2.5.0~beta1

[kit-ty-kate]

This pull-request concerns:

• opam-client.2.5.0~beta1: Client library for opam 2.5
• opam-core.2.5.0~beta1: Core library for opam 2.5
• opam-devel.2.5.0~beta1: Bootstrapped development binary for opam 2.5
• opam-format.2.5.0~beta1: Format library for opam 2.5
• opam-installer.2.5.0~beta1: Installation of files to a prefix, following opam conventions
• opam-repository.2.5.0~beta1: Repository library for opam 2.5
• opam-solver.2.5.0~beta1: Solver library for opam 2.5
• opam-state.2.5.0~beta1: State library for opam 2.5

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• Homepage: https://opam.ocaml.org
• Source repo: git+https://github.com/ocaml/opam.git
• Bug tracker: https://github.com/ocaml/opam/issues

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🐫 Pull-request generated by opam-publish v2.7.0

[avsm]

Just one revdep failure on odoc-driver constrained in #28890

# File "src/driver/opam.ml", line 61, characters 13-39:
# 61 |           if OpamStd.String.starts_with ~prefix:"opam-version" str then
#                   ^^^^^^^^^^^^^^^^^^^^^^^^^^
# Error: Unbound value OpamStd.String.starts_with