<!-- Describe what has changed in this PR -->
Dynamic config to suppress error when setting system search attributes
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Create a way to prevent errors when new system search attributes are
added, but there is already a custom search attribute registered with
the same name.
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test? Checked in staging env? -->
Added unit test.
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change to production? -->
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stated in `docs/`? If significant
new behavior is added, have you described that in `docs/`? -->
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