Add ability to specify IPA file when starting Test Plan via REST API

[You-Hsuan]

Could we add the ability to select which IPA file to use when staring Test Plan via REST API please?
By doing so, we can start a new Test Plan with a new app source (IPA file) through Bitrise without manual work.

For example, once Bitrise generates a IPA file, we upload the IPA file to Testsigma(POST v1/uploads). But currently, we still need to visit Testsigma webpage to configure "Test Device $ Suites" to select the new IPA file before starting the updated Test Plan.

Hope to hear from you soon, thank you!