[native] Fix crash in httpclient when accessing null eventbase #23258
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Description
Fixing a crash when eventbase is null and accessed in httpclient
Motivation and Context
We are observing following crash sporadically when a worker is shutting down:
The reason is eventbase_ is a raw pointer and it can be null in this scenario. Adding null check before accessing it.
Impact
Shutdown crash is not observed anymore.
Test Plan
Existing tests and ran in a cluster setup to see worker shutdown is going fine.