Nullptr exceptions in Collator destructors on x86 macos14.

From alex.neben@mongodb.com patch builds related to SERVER-90993:
https://spruce.mongodb.com/version/6699ef3441d032000798a418/tasks
https://spruce.mongodb.com/version/6699eeabeb8050000702c3ca/tasks

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7 failures were related segfaults, reading address values in the single digit range, up to 0x4 or so. I think it might be worth pinging the query team about their use of ICU. This could just be undefined behavior manifesting differently under libc++ or something (example).

This destructor appear in the stack trace icu::RuleBasedCollator::~RuleBasedCollator

Reaching out to Query for advice on these collator nullptr problems.
https://mongodb.slack.com/archives/CKABWR2CT/p1721445165655699