Make `rust_doc_test` inherit it's crate aliases attribute (#2007)

* make rust_doc_test inherit crate aliases

* add test for rustdoc_test for a crate with aliased dependency

* add renamed dependency usage inside the doc-string to check
rust_doc_test working with aliases

* Update test/unit/rustdoc/rustdoc_test_dep_with_alias.rs

Co-authored-by: UebelAndre <github@uebelandre.com>

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Co-authored-by: k1nkreet <polyakovskiy.ilya@gmail.com>
Co-authored-by: UebelAndre <github@uebelandre.com>