do not install libze_loader

[bratpiorka]

Never build and install ze_loader by using FetchContent_Populate instead of MakeAvailable. After this change, we have to find ze_loader installed on the system instead of using the one built by us.
Additionally, add testing cmake 3.14, which is the oldest supported version by UMF.

Example of failed installation/deinstallation test (requires using CMake 3.14.0):
https://github.com/oneapi-src/unified-memory-framework/actions/runs/14692346477/job/41229764121?pr=1285

fixes: #1110

[Copilot]

Pull Request Overview

This PR removes the custom installation of ze_loader by no longer using FetchContent_Populate, and updates the installation command for UMF as well as the GitHub Actions workflow to test with CMake 3.14, the oldest supported version by UMF.

• Updated UMF installation command from "cmake --install" to "cmake --build ... --target install"
• Modified GitHub Actions workflow to conditionally install a minimum CMake version for specific test matrices

Reviewed Changes

Copilot reviewed 2 out of 11 changed files in this pull request and generated no comments.

File	Description
test/test_installation.py	Changes the UMF installation command and adds a debug print for the command
.github/workflows/reusable_basic.yml	Updates matrix configurations and adds a step to install CMake when required

Files not reviewed (9)

• CMakeLists.txt: Language not supported
• benchmark/CMakeLists.txt: Language not supported
• cmake/FindZE_LOADER.cmake: Language not supported
• examples/CMakeLists.txt: Language not supported
• examples/cmake/FindZE_LOADER.cmake: Language not supported
• examples/cuda_shared_memory/CMakeLists.txt: Language not supported
• examples/ipc_level_zero/CMakeLists.txt: Language not supported
• examples/level_zero_shared_memory/CMakeLists.txt: Language not supported
• test/CMakeLists.txt: Language not supported

Comments suppressed due to low confidence (2)

test/test_installation.py:184

• Removing the '--prefix' argument from the install command may lead to an installation in an unintended directory if the build configuration does not already specify the correct CMAKE_INSTALL_PREFIX. Consider confirming that the build configuration predefines the install directory or reintroducing the '--prefix {self.install_dir}' parameter.

install_cmd = f"cmake --build {self.build_dir} --config {self.build_type.title()} --target install"

.github/workflows/reusable_basic.yml:138

• Removing 'cmake' from the apt-get install command may result in systems with an outdated default CMake when matrix.cmake_ver is set to 'latest'. Ensure that jobs using 'latest' have an appropriate CMake version available or add an additional update step.

sudo apt-get install -y clang libnuma-dev lcov