[MIT-3594] Sunset Internet Banking

[rosle]

Description

Remove Internet Banking related code from the codebase. Here we're removing/replacing the internet banking method in the tests.

Related links:

• https://opn-ooo.atlassian.net/browse/MIT-3594

Rollback procedure

default rollback procedure

[Copilot]

Pull request overview

Removes remaining Internet Banking references from tests, mocks, and example source/charge creation flows as part of sunsetting Internet Banking support.

Changes:

• Update source creation/retrieval test data and mocks from internet_banking_bbl to mobile_banking_bbl (and flow to app_redirect).
• Remove internet_banking_* entries from the capability retrieval mock.
• Update JS/TS examples to create a non–Internet Banking source (promptpay) for the source-charge example.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/test_omise_source.js	Switches the test source type away from Internet Banking.
test/mocks/sources_retrieve.js	Updates mocked retrieved source to mobile_banking_bbl and app_redirect flow.
test/mocks/sources_create.js	Updates mocked created source to mobile_banking_bbl and app_redirect flow.
test/mocks/capability_retrieve.js	Removes Internet Banking payment methods from mocked capabilities response.
examples/typescript/src/create_source_charge.ts	Updates example source type to promptpay (non–Internet Banking).
examples/javascript/create_source_charge.js	Updates example source type to promptpay (non–Internet Banking).

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