Create AvoidEagerApis and surrounding infrastructure

[kelvinou01]

Before this PR

This PR adds

• An error-prone to ban common ways eagerness "sprouts" from the codebase, to prevent more eagerness from appearing in all Palantir gradle code
• Surrounding infrastructure for matching + fixing (similar to IllegalMethodCalledDuringTaskExecution)
• Two example autofixes to demonstrate said infrastructure. The autofixes are gated behind BestEffortMode
• 500 lines of tests

After this PR

==COMMIT_MSG==
Create AvoidEagerApis and surrounding infrastructure
==COMMIT_MSG==

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• Feature (Adding new functionality)
• Improvement (Improving existing functionality)
• Fix (Fixing an issue with existing functionality)
• Break (Creating a new major version by breaking public APIs)
• Deprecation (Removing functionality in a non-breaking way)
• Migration (Automatically moving data/functionality to a new system)

Description

Create AvoidEagerApis and surrounding infrastructure

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✨ Features

• Create AvoidEagerApis and surrounding infrastructure (#275)