Changed tv scheduled program record for media analytics customers to class

### What are the schemas that are affected by the issue
---
- media-analytics-scheduled-program.schema.json [DELETED]
- media-scheduled-program.schema.json [NEW]

### What the products that are impacted by the issue
----------------
- Adobe Media Analytics

Internal Jira issue: https://jira.corp.adobe.com/browse/VA-7257

### Context
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Media customers need the ability to define tv programs. This allows customers to better understand analytics data about media consumption.

### Changes
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Converted a field group to a class.

Removed a fieldgroup to define a tv scheduled program:
- components/fieldgroups/tv-scheduile/media-analytics-scheduled-program.schema.json

Added a class to define a tv scheduled program:
- components/classes/media-scheduled-program.schema.json

Start by comparing components/fieldgroups/tv-scheduile/media-analytics-scheduled-program.schema.json with components/classes/media-scheduled-program.schema.json and review the surrounding schema conventions. Done means the field-group schema is removed and the class schema defines the TV scheduled program required by Adobe Media Analytics.

Written by the indexing model from the issue text.