fix(billing): hide pay now for self serve partner

[brendanhsentry]

No description provided.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
9631	1	9630	4

View the top 1 failed test(s) by shortest run time

InvoiceDetails > Payment Form renders an error when intent creation fails

Stack Traces | 0.07s run time

TestingLibraryElementError: Unable to find an element with the text: /Unable to initialize payment/. This could be because the text is broken up by multiple elements. In this case, you can provide a function for your text matcher to make your matcher more flexible.

Ignored nodes: comments, script, style
...
    at Object.getElementError (.../sentry/sentry/node_modules/@.../dom/dist/config.js:37:19)
    at .../sentry/sentry/node_modules/@.../dom/dist/query-helpers.js:76:38
    at .../sentry/sentry/node_modules/@.../dom/dist/query-helpers.js:52:17
    at .../sentry/sentry/node_modules/@.../dom/dist/query-helpers.js:95:19
    at Object.<anonymous> (.../views/invoiceDetails/paymentForm.spec.tsx:117:45)

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