Auto merge of #81507 - weiznich:add_diesel_to_cargo_test, r=Mark-Simulacrum

Adding diesel to the cargotest suite

As discussed in https://github.com/rust-lang/rust/issues/79560#issuecomment-767542364 this adds diesel to the compilers test suite. This is basically a reopened version of #79599, but now with the backing of the compiler team.

r? `@pnkfelix`

diff --cc src/tools/cargotest/main.rs
index 0a6bac48ebbac81afe275272c01a2e887071114e,574938235c6eea6372c55994b0a663b627e95e7a..fc608eaabccf7827c946530eb9de7fff540eac42
--- 1/src/tools/cargotest/main.rs
--- 2/src/tools/cargotest/main.rs
+++ b/src/tools/cargotest/main.rs
@@@ -36,9 -44,11 +44,11 @@@ const TEST_REPOS: &[Test] = &
      Test {
          name: "xsv",
          repo: "https://github.com/BurntSushi/xsv",
 -        sha: "66956b6bfd62d6ac767a6b6499c982eae20a2c9f",
 +        sha: "3de6c04269a7d315f7e9864b9013451cd9580a08",
          lock: None,
          packages: &[],
+         features: None,
+         manifest_path: None,
      },
      Test {
          name: "servo",