Replace mockito with mocktail

[sourcegraph-wk]

In order to help with build times and ease null safety migration, we've opted to replace mockito with mocktail. This batch runs the codemod to swap things out, but may require manual intervention.
FEDX will come around and fix things up unless you beat us to it. Once CI is green and the PR is not in draft, you can review and merge it.
For more info, reach out to #support-frontend-dx on Slack.

Created by Sourcegraph batch change Workiva/mocktail.

[aviary3-wk]

Security Insights

No security relevant content was detected by automated scans.

Action Items

• Review PR for security impact; comment "security review required" if needed or unsure
• Verify aviary.yaml coverage of security relevant code

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Questions or Comments? Reach out on Slack: #support-infosec.

[robbecker-wf]

+10 tests pass on mocktail instead of mockito @Workiva/release-management-p

[rmconsole-wf]

+1 from RM