Removes/replaces remaining references to sample_count and sample_offset

[j616]

Details

sample_count and sample_offset were deprecated in TAMS v8.0, with the change being introduced in #147 . This PR removes lingering references to those parameters, and updates example scripts to instead use object_timerange

Jira Issue (if relevant)

Jira URL: https://jira.dev.bbc.co.uk/browse/CLOUDFIT-5514

Related PRs

Where appropriate. Indicate order to be merged.

Submitter PR Checks

(tick as appropriate)

• PR completes task/fixes bug
• API version has been incremented if necessary
• ADR status has been updated, and ADR implementation has been recorded
• Documentation updated (README, etc.)
• PR added to Jira Issue (if relevant)
• Follow-up stories added to Jira

Reviewer PR Checks

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• PR completes task/fixes bug
• Design makes sense, and fits with our current code base
• Code is easy to follow
• PR size is sensible
• Commit history is sensible and tidy

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