fix CI build (optimize memory usage during build)

packaging/alpine/local/greptimedb/APKBUILD

@@ -31,9 +31,13 @@ options="net"
 source="$pkgname-$pkgver.tar.gz::https://github.com/GreptimeTeam/greptimedb/archive/refs/tags/v$pkgver.tar.gz"
 
 _rust_toolchain="nightly-2026-03-21"
+_cargo_profile="nightly"
 export CARGO_HOME="$srcdir/cargo"
 export RUSTUP_HOME="$srcdir/rustup"
 export CARGO_BUILD_JOBS="${CARGO_BUILD_JOBS:-2}"
+export CARGO_PROFILE_NIGHTLY_CODEGEN_UNITS="${CARGO_PROFILE_NIGHTLY_CODEGEN_UNITS:-16}"
+export CARGO_PROFILE_NIGHTLY_DEBUG="${CARGO_PROFILE_NIGHTLY_DEBUG:-false}"
+export CARGO_PROFILE_NIGHTLY_LTO="${CARGO_PROFILE_NIGHTLY_LTO:-thin}"
 export LIBRARY_PATH="/usr/lib"
 
 prepare() {
@@ -47,18 +51,18 @@ prepare() {
 
 build() {
 	"$CARGO_HOME"/bin/rustup run "$_rust_toolchain" cargo build \
-		--release \
+		--profile "$_cargo_profile" \
 		--locked \
 		--bin greptime \
 		--features servers/dashboard
 }
 
 check() {
-	"$builddir"/target/release/greptime --version
+	"$builddir"/target/"$_cargo_profile"/greptime --version
 }
 
 package() {
-	install -Dm755 "$builddir"/target/release/greptime \
+	install -Dm755 "$builddir"/target/"$_cargo_profile"/greptime \
 		"$pkgdir"/usr/bin/greptime
 }