[Workplace Search] Fix error loading connector config data on Source Settings view

[byronhulcher]

Summary

The view was not setting a serviceType prop for AddSourceLogic so when AddSourceLogic.actions.getSourceConfigData() was being called serviceType was undefined.

Introduced in #131802

[kibana-ci]

💛 Build succeeded, but was flaky

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• Commit: 57a5766
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Failed CI Steps

• FTR Configs #22

Test Failures

• [job] [logs] FTR Configs #22 / alerting api integration spaces only Alerting bulkEdit should return mapped params after bulk edit

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
enterpriseSearch	1.5MB	1.5MB	+47.0B

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