Automatically add Athena partition when new test results are available

[binarylogic]

In order for Athena to query new benchmarking data is must know about the partition. This is achieved by running a repair query:

MSCK REPAIR TABLE vector_tests

This query is expensive and takes a few minutes to execute. This is because it's listing every file in the bucket in order to discover new partitions. A much more efficient method is to add the partition directly:

ALTER TABLE vector_tests ADD PARTITION (...) location 's3://test-results.vector.dev/../../../'

For example, this could be done automatically by listening for new S3 files being placed in the bucket and firing a lambda to run this query.