Splitting Test Directories to Increase Test Concurrency and Optimize Cache

Enhancement

we are using Bazel's shard_count to increase test concurrency and speed up our testing process. However, in some cases, we have found that certain directories have too many tests, which can result in slower test execution times, decreased efficiency, and less optimized cache usage.

To address this issue, we need to split the test directories into smaller, more manageable chunks. This will help increase test concurrency, optimize cache usage, and ultimately improve our testing process.