Auto merge of #14459 - epage:msrv-rustc, r=Muscraft

feat(resolve): Report incompatible-with-rustc when MSRV-resolver is disabled

### What does this PR try to resolve?

This builds on #14457 to report when deps are incompatible with rustc when an MSRV-aware resolver is not used.
This affects stable code.

### How should we test and review this PR?

### Additional information

Author: bors

src/cargo/ops/cargo_update.rs

@@ -1121,5 +1121,9 @@ fn annotate_required_rust_version(
                     .map(|(dep, _)| (Some(required_rust_version.clone()), dep)),
             );
         }
+    } else {
+        for change in changes.values_mut() {
+            change.required_rust_version = rustc_version.clone();
+        }
     }
 }

tests/testsuite/cargo_add/rustc_ignore/stderr.term.svg

@@ -157,6 +157,8 @@ fn lint_dep_incompatible_with_rust_version() {
         .with_stderr_data(str![[r#"
 [UPDATING] `dummy-registry` index
 [LOCKING] 3 packages to latest compatible versions
+[ADDING] too_new_child v0.0.1 (requires Rust 1.2345.0)
+[ADDING] too_new_parent v0.0.1 (requires Rust 1.2345.0)
 
 "#]])
         .run();
@@ -296,6 +298,8 @@ fn resolve_with_rustc() {
         .with_stderr_data(str![[r#"
 [UPDATING] `dummy-registry` index
 [LOCKING] 2 packages to latest compatible versions
+[ADDING] newer-and-older v1.6.0 (requires Rust 1.2345)
+[ADDING] only-newer v1.6.0 (requires Rust 1.2345)
 
 "#]])
         .run();