Rollup merge of rust-lang#86568 - ehuss:dist-miri-stable, r=Mark-Simulacrum

Don't dist miri or rust-analyzer on stable or beta.

This prevents miri and rust-analyzer from being built for "dist" or "install" on the stable/beta channels. It is a nightly-only tool and should not be included.

Closes rust-lang#86286

Author: JohnTitor

src/bootstrap/dist.rs

@@ -1072,6 +1072,12 @@ impl Step for RustAnalyzer {
     }
 
     fn run(self, builder: &Builder<'_>) -> Option<GeneratedTarball> {
+        // This prevents rust-analyzer from being built for "dist" or "install"
+        // on the stable/beta channels. It is a nightly-only tool and should
+        // not be included.
+        if !builder.build.unstable_features() {
+            return None;
+        }
         let compiler = self.compiler;
         let target = self.target;
         assert!(builder.config.extended);
@@ -1171,6 +1177,12 @@ impl Step for Miri {
     }
 
     fn run(self, builder: &Builder<'_>) -> Option<GeneratedTarball> {
+        // This prevents miri from being built for "dist" or "install"
+        // on the stable/beta channels. It is a nightly-only tool and should
+        // not be included.
+        if !builder.build.unstable_features() {
+            return None;
+        }
         let compiler = self.compiler;
         let target = self.target;
         assert!(builder.config.extended);