### What changes were proposed in this pull request?
This proposes to update the dropwizard/codahale metrics library version used by Spark to `3.2.6` which is the last version supporting Ganglia.
### Why are the changes needed?
Spark is currently using Dropwizard metrics version 3.1.5, a version that is no more actively developed nor maintained, according to the project's Github repo README.
### Does this PR introduce any user-facing change?
No
### How was this patch tested?
Existing tests + manual tests on a YARN cluster.
Closes#26212 from LucaCanali/updateDropwizardVersion.
Authored-by: Luca Canali <luca.canali@cern.ch>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
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