Adding metadata for all country data CDS

[shaikh-raj]

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IMPORTANT NOTICE

Before opening the Pull Request make sure that you:

• Have read the CONTRIBUTING GUIDE
• Have read the DATA MODEL and DATA SOURCES documentation.
• Have check that your code is compliant with both.

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Description

Added metadata data for all countries granular covid data scrapped from CDS

Checklist:

• [ X] I have read the CONTRIBUTING GUIDE and made sure this Pull Request is compliant with it.
• [ X] I have read the DATA MODEL and DATA SOURCES and made sure this Pull Request is compliant with it.
• [ X] My code follows the style guidelines of this project
• [ X] I have performed a self-review of my own code
• [ X] I have commented my code, particularly in hard-to-understand areas
• [ X] I have made corresponding changes to the documentation
• [ X] My changes generate no new warnings
• [ X] I have added tests that prove my fix is effective or that my feature works
• [ X] New and existing unit tests pass locally with my changes
• [ ]X Any dependent changes have been merged and published in downstream modules