fix(cpu): fixed reading cpus.yaml

[vimalk78]

• fixed reading cpus.yaml file
• added unit tests

[github-actions]

🤖 SeineSailor

Here's a concise summary of the pull request changes:

Summary: This pull request fixes an issue with reading cpus.yaml and adds unit tests. Key changes include:

• Renaming fields in the cpuModelData struct from lowercase to uppercase
• Introducing an unknownCpuArch constant and updating the cpuArch() function to return it on failure
• Adding a new cpuMicroArchitectureFromModel() function to determine microarchitecture from YAML file data
• Updating the existing cpuMicroArchitecture() function to use the new function

Impact: These changes do not affect the external interface or behavior of the code, except in error cases where the behavior might be affected.

Observations: The changes seem to improve the robustness of the code in handling errors when reading the cpus.yaml file. However, it would be beneficial to consider adding more comprehensive error handling and logging to ensure that any issues are properly reported and debuggable.

[sthaha]

Suggested change

	if err != nil {
	return arch, nil
	}
	if err == nil {
	return arch, nil
	}

[sthaha]

lgtm