Run the selected ReleaseKit tool through Go

scripts/releasekit.sh

@@ -11,8 +11,4 @@ GOOS=$(go env GOHOSTOS)
 GOARCH=$(go env GOHOSTARCH)
 export GOOS GOARCH
 
-mkdir -p .releasekit/bin
-go build -mod=readonly -o .releasekit/bin/releasekit \
-	"go.maximumdirect.net/releasekit/cmd/releasekit"
-
-exec ./.releasekit/bin/releasekit "$@"
+exec go tool go.maximumdirect.net/releasekit/cmd/releasekit "$@"

scripts/test-release.py

@@ -106,10 +106,11 @@ def verify_bootstrap(repository, root, environment, selected_go):
     version = run([launcher, "version"], root, environment).strip()
     if version != f"releasekit {selected_version}":
         raise RuntimeError(f"launcher used an unexpected tool: {version}")
-    build_info = run(
-        ["go", "version", "-m", str(repository / ".releasekit/bin/releasekit")],
-        root, environment,
-    )
+    tool_path = run(
+        ["go", "tool", "-n", f"{RELEASEKIT_MODULE}/cmd/releasekit"],
+        repository, environment,
+    ).strip()
+    build_info = run(["go", "version", "-m", tool_path], root, environment)
     if selected_go not in build_info.splitlines()[0]:
         raise RuntimeError("launcher did not build with the selected local Go")
     if f"\tmod\t{RELEASEKIT_MODULE}\t{selected_version}\t" not in build_info: