revert commit ec505d7: instead, use the right options in LLAMA env var for both make and make test

Eliminates the inclusion of libggml-blas.a and its linker flag from the macOS build configuration in the Makefile. This streamlines the build process and avoids unnecessary dependencies for macOS targets.
Usage example:
export the following env var to use them both for make and make test:
LLAMA="-DGGML_NATIVE=OFF -DGGML_METAL=ON -DGGML_ACCELERATE=ON -DGGML_BLAS=ON -DGGML_BLAS_VENDOR=Apple"
WHISPER="-DWHISPER_COREML=ON -DWHISPER_COREML_ALLOW_FALLBACK=ON"
SQLITE3=/opt/homebrew/Cellar/sqlite/3.50.4/bin/sqlite3

Author: andinux

Makefile

@@ -72,7 +72,6 @@ ifeq ($(PLATFORM),windows)
 else ifeq ($(PLATFORM),macos)
 	TARGET := $(DIST_DIR)/ai.dylib
 	LLAMA_LIBS += $(BUILD_GGML)/lib/libggml-metal.a
-	LLAMA_LIBS += $(BUILD_GGML)/lib/libggml-blas.a
 	ifndef ARCH
 		LDFLAGS += -arch x86_64 -arch arm64
 		CFLAGS += -arch x86_64 -arch arm64
@@ -86,7 +85,7 @@ else ifeq ($(PLATFORM),macos)
 		WHISPER_OPTIONS += -DGGML_OPENMP=OFF -DCMAKE_OSX_ARCHITECTURES="$(ARCH)" -DCMAKE_OSX_DEPLOYMENT_TARGET=11.0
 		MINIAUDIO_OPTIONS += -DCMAKE_OSX_ARCHITECTURES="$(ARCH)" -DCMAKE_OSX_DEPLOYMENT_TARGET=11.0
 	endif
-	LDFLAGS += -L./$(BUILD_GGML)/lib -lggml-metal -L./$(BUILD_GGML)/lib -lggml-blas -framework Metal -framework Foundation -framework CoreFoundation -framework QuartzCore -dynamiclib -undefined dynamic_lookup -headerpad_max_install_names
+	LDFLAGS += -L./$(BUILD_GGML)/lib -lggml-metal -L./$(BUILD_GGML)/lib -framework Metal -framework Foundation -framework CoreFoundation -framework QuartzCore -dynamiclib -undefined dynamic_lookup -headerpad_max_install_names
 	STRIP = strip -x -S $@
 else ifeq ($(PLATFORM),android)
 	ifndef ARCH # Set ARCH to find Android NDK's Clang compiler, the user should set the ARCH