remove draft state check from announcement broadcast policy
remove draft state check from announcement broadcast policy

fixes CNVS-17975

test plan
- create an announcement with a delay post at date
- wait for delay post time
- ensure that announcement notification is sent

Change-Id: Ic6186de76c45622e8af7f33b8059c2262eb03003
Reviewed-on: https://gerrit.instructure.com/47682
Tested-by: Jenkins
Reviewed-by: Matthew Wheeler <ce71fbafda91d6c8f12582e1837687d5fe592dd9@instructure.com>
QA-Review: Steven Shepherd <e794458448443812fb2685675aab3bbd1a3891bc@instructure.com>
Product-Review: Joel Hough <4816dabf8db1bc6cac35b3a24cab2ff844b5b0c7@instructure.com>

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