Docs: New Section - Data Quality & Observability

[ShilpaVernekar]

Describe your changes:

• Minor change to the Release Date
• Deleted the section from Docs for Data Quality & Observability
• Deleted the section from How-to Guides for Data Quality & Profiler
• All those articles are added in a new section called Data Quality & Observability within the How-to Guides
  Discussed with @TeddyCr about the same before making the changes.

@harshach - Since the old section has been deleted. It is expected that the previous DQ links would not work.

Fixes

I worked on ... because ...

Type of change:

• Bug fix
• Improvement
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation

Checklist:

• I have read the CONTRIBUTING document.
• My PR title is Fixes <issue-number>: <short explanation>
• I have commented on my code, particularly in hard-to-understand areas.
• For JSON Schema changes: I updated the migration scripts or explained why it is not needed.