Cargo.toml: More publish preparation (#43457)

Add further missing repository keys / descriptions, which I missed in
#43451 due to a suboptimal grep (assuming that rust-version.workspace is
always the last item).
Additionally fix crate self-references, which caused cargo-publish to
fail, due to it trying to fetch the crate from crates.io.
When specifying the current crate in `[dev-dependencies]` to enable a
test feature or similar, apparently one should not use `workspace =
true` and instead use `path`.
This requires extending the previously added `tidy` check, to allow
`path` dependencies in this specific case outside of the workspace
Cargo.toml.

Testing: Covered by existing tests

---------

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

python/tidy/tests/path_dependency/self-reference.Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "test-package"
+version = "0.0.1"
+license = "MPL-2.0"
+publish = false
+
+[features]
+test-feature = []
+
+[dev-dependencies]
+test-package = { path = "." }
+other-name = { package = "test-package", path = "."}