Add approve claim button to provider rejected sampling claim

[dp-daly]

Context

We are making progressive enhancements to the support console to assist in the processing of Claims.

Changes proposed in this pull request

• Create an 'approve claim' button for a claim with the status of sampling_provider_not_approved
• Extend the functionality that exists for 'approve claim' for those with a status of sampling_in_progress which converts the status of paid once the support user has confirmed approval.

Guidance to review

• Log in as Colin
• Navigate to the claims > sampling index
• Click on a claim with the status "Provider not approved"
• View the show page and verify that an "Approve claim" button exists
• Click "Approve claim" and view the confirmation page
• Click "Approve claim" on this page
• Check that the claim no longer appears in the sampling index
• Check that the claim can be found in the "All claims" index with a status of "Paid"

Link to Trello card

https://trello.com/c/MeEhRVlW/363-allow-support-users-to-approve-sampling-claims-after-provider-rejection

Screenshots