utilize rust-installer --prepared-only flag in bootstrap tarball

Signed-off-by: onur-ozkan <work@onurozkan.dev>

src/bootstrap/src/utils/tarball.rs

@@ -108,6 +108,7 @@ pub(crate) struct Tarball<'a> {
     include_target_in_component_name: bool,
     is_preview: bool,
     permit_symlinks: bool,
+    is_prepare_only: bool,
 }
 
 impl<'a> Tarball<'a> {
@@ -148,6 +149,7 @@ impl<'a> Tarball<'a> {
             include_target_in_component_name: false,
             is_preview: false,
             permit_symlinks: false,
+            is_prepare_only: false,
         }
     }
 
@@ -167,6 +169,10 @@ impl<'a> Tarball<'a> {
         self.is_preview = is;
     }
 
+    pub(crate) fn is_prepare_only(&mut self, is: bool) {
+        self.is_prepare_only = is;
+    }
+
     pub(crate) fn permit_symlinks(&mut self, flag: bool) {
         self.permit_symlinks = flag;
     }
@@ -301,6 +307,10 @@ impl<'a> Tarball<'a> {
             .arg(&self.overlay_dir)
             .arg("--output-dir")
             .arg(distdir(self.builder));
+
+        if self.is_prepare_only {
+            cmd.arg("--prepare-only");
+        }
     }
 
     fn run(self, build_cli: impl FnOnce(&Tarball<'a>, &mut Command)) -> GeneratedTarball {
@@ -355,6 +365,7 @@ impl<'a> Tarball<'a> {
             path: distdir(self.builder).join(format!("{package_name}.tar.{ext}")),
             decompressed_output,
             work: self.temp_dir,
+            component: self.component,
         }
     }
 }