tests : avoid building get-model.cpp many times (#26317)

* tests : remove get-model.cpp

* tests : fix quant type selection

common/common.cpp

@@ -1476,6 +1476,20 @@ std::string common_get_model_endpoint() {
     return model_endpoint;
 }
 
+char * common_get_model_or_exit(int argc, char * argv[]) {
+    if (argc > 1) {
+        return argv[1];
+    }
+
+    char * path = getenv("LLAMACPP_TEST_MODELFILE");
+    if (!path || strlen(path) == 0) {
+        fprintf(stderr, "\033[33mWARNING: No model file provided. Skipping this test. Set LLAMACPP_TEST_MODELFILE=<gguf_model_path> to silence this warning and run this test.\n\033[0m");
+        exit(EXIT_SUCCESS);
+    }
+
+    return path;
+}
+
 common_context_seq_rm_type common_context_can_seq_rm(llama_context * ctx) {
     auto * mem = llama_get_memory(ctx);
     if (mem == nullptr) {

common/common.h

@@ -930,6 +930,9 @@ void common_set_adapter_lora(struct llama_context * ctx, std::vector<common_adap
 // model endpoint from env
 std::string common_get_model_endpoint();
 
+// for testing purposes
+char * common_get_model_or_exit(int, char*[]);
+
 //
 // Context utils
 //