Draft: (paused) Use workspace for Cargo.toml files

Cargo provides a workspace feature (book, reference). We can use it to avoid repetition.

end2end-tests/Cargo.toml

 [package]
-authors = ['Axiom-Team Developers <https://axiom-team.fr>']
 description = 'duniter end2end tests.'
-edition = "2021"
-homepage = 'https://duniter.org'
-license = 'AGPL-3.0'
 name = 'duniter-end2end-tests'
-repository = 'https://git.duniter.org/nodes/rust/duniter-v2s'
-version = '3.0.0'
+edition.workspace = true
+authors.workspace = true
+license.workspace = true
+repository.workspace = true
+documentation.workspace = true
+homepage.workspace = true
+version.workspace = true
 
 [dev-dependencies]
 anyhow = "1.0"