Leave SC6101 out of the native compiler's self-builds

The compiler's own source has 24 likely-hot functions that use untyped
values, so its self-builds now print SC6101. The native bootstrap
contracts compare stderr exactly; the rebuilds of the compiler entry pass
--no-dynamic-tier-warning, which changes no IR or LLVM output.

tests/harness/self-hosting-native-driver.test.ts

@@ -185,6 +185,10 @@ test(
         return result.stdout;
       };
       const entry = join(root, "packages/compiler/src/native/cli.ts");
+      // The compiler's own source has untyped functions that SC6101 reports
+      // (diagnostics/dynamic-tier.ts). The contracts compare stderr exactly,
+      // so its self-builds leave that performance note out.
+      const quiet = "--no-dynamic-tier-warning";
       const ffi = join(directory, ".scriptc/distribution-seed/compiler.ffi.json");
       const rebuilt = executable("scriptc-rebuilt");
       const checkProgram = async (compiler: string, source: string, extra: string[] = []) => {
@@ -541,7 +545,18 @@ test(
         const self = await bootstrapStep("production CLI rebuilds itself", () =>
           invoke(
             seed,
-            ["build", entry, "-o", rebuilt, "--strip", "--keep-llvm", "--emit-ir", "--ffi", ffi],
+            [
+              "build",
+              entry,
+              "-o",
+              rebuilt,
+              "--strip",
+              "--keep-llvm",
+              "--emit-ir",
+              "--ffi",
+              ffi,
+              quiet,
+            ],
             "scriptc: warning: --emit-ir is deprecated; use --emit=ir for IR as the primary output\n",
           ),
         );
@@ -554,7 +569,16 @@ test(
           const seedLlvm = join(directory, "cli.ll");
           const rebuiltLlvm = join(directory, "rebuilt.ll");
           await bootstrapStep("rebuilt compiler emits itself", () =>
-            invoke(rebuilt, ["build", entry, "--emit=llvm", "-o", rebuiltLlvm, "--ffi", ffi]),
+            invoke(rebuilt, [
+              "build",
+              entry,
+              "--emit=llvm",
+              "-o",
+              rebuiltLlvm,
+              "--ffi",
+              ffi,
+              quiet,
+            ]),
           );
           // Executable output adds a runtime ABI check; textual LLVM emission
           // omits it. Compare all other output without changing either mode.
@@ -585,7 +609,7 @@ test(
       const rebuildFrontend = async () => {
         const lowered = join(directory, "cli.ir.json");
         const output = await bootstrapStep("sanitized native frontend lowers the compiler", () =>
-          invoke(seed, ["build", entry, "--emit=ir", "-o", lowered, "--ffi", ffi]),
+          invoke(seed, ["build", entry, "--emit=ir", "-o", lowered, "--ffi", ffi, quiet]),
         );
         expect(output.trim()).toBe(lowered);
         await compareArtifacts({ ir: true, llvm: false });
@@ -605,6 +629,7 @@ test(
               ffi,
               "--sanitize",
               "--optimization=dev",
+              quiet,
             ],
             "",
             { SCRIPTC_BOOTSTRAP_IR_INPUT: seedIr },