Revert "Convert build scripts to CMake (#13427)"

This reverts commit 354df17d16.

scripts/build-lshpack.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -exo pipefail
+source $(dirname -- "${BASH_SOURCE[0]}")/env.sh
+
+rm -rf CMakeFiles CMakeCache build.ninja
+mkdir -p $BUN_DEPS_OUT_DIR
+
+cd $BUN_DEPS_DIR/ls-hpack
+
+rm -rf CMakeCache* CMakeFiles
+
+cmake "${CMAKE_FLAGS[@]}" . \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DLSHPACK_XXH=ON \
+    -DSHARED=0 \
+    -GNinja
+
+ninja libls-hpack.a
+
+cp ./libls-hpack.a $BUN_DEPS_OUT_DIR/liblshpack.a