Download lyrics with save operation

[SilentDude]

Download lyrics with save operation

Description

Save operation in version 4.2.8 doesn't download lyrics from lyrics providers. I copied this feature from downloader.py -> search_and_download() and refactored save operation code a bit.

Related Issue

#2151

Motivation and Context

Allows for downloading song lyrics, without need to download entire track.

How Has This Been Tested?

Ran save operation on version 4.2.8 and my commit, then compared save-file outputs.
Also compared download operation using --save-file argument to be sure.
Checked cases both with and without --preload argument.
I only notice change in availability of lyrics in save-file after save operation.

Environment:
Python 3.12.6
Venv

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project --- ran pylint, black and mypy
• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have read the CONTRIBUTING document
• I have read the CORE VALUES document --- is it renamed to CODE_OF_CONDUCT.md?
• I have added tests to cover my changes
• All new and existing tests passed - 1 failed, although it also fails on main branch