make-check-test failed on ! Ubuntu 20.04 MSAN

Host: ec2-54-209-136-49.compute-1.amazonaws.com
Project: WiredTiger (develop)
Commit: diff: WT-8368 Avoid using a wrapper in __wt_verbose_multi (#7171)

Letting 'wt_verbose_multi' wrap over another macro results in the
category field completely expanding, rather than its intermediate
string representation. For various uses of the macro this ends up
being a string representation of the entire
WT_VERBOSE_MULTI_CATEGORY struct definition, resulting in overly
verbose output. To fix this, avoid calling an underlying macro,
rather perform the multi-verbose check inline. | 10 Nov 21 00:46 UTC
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