Optimize getting common base class for types in an array

[aparajit-pratap]

Purpose

ArrayUtils.GetTypeStatisticsForArray used to unnecessarily be called twice in a few callers, once outside and once inside the call to GetCommonSubClassForArray. This PR refactors the code so that the type stats from GetTypeStatisticsForArray can be passed into the method that returns the common base type if the type stats are already computed.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Release Notes

Performance optimization in determining types in arrays.

[sm6srw]

LGTM!

[mjkkirschner]

It looks good, but perhpas something is up with the test job not setting github checks correctly - has this passed yet?