convert shared/_inlined_preview js_block into js_bundle

test plan:
* regression test shared inlined preview

Change-Id: I1e2f70258878c14b0fd28e8848b6c87b096c027d
Reviewed-on: https://gerrit.instructure.com/29110
Reviewed-by: Jon Jensen <jon@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Marc LeGendre <marc@instructure.com>
QA-Review: Marc LeGendre <marc@instructure.com>