#366 Track raw files at sources and in the metastore by size instead by count

[yruslan]

Closes #366

Since the choice of what info to track spreads across all pipeline, and can't be solved on the source level of RawFileSource, I decided to always track files by size, and not make it optional.

We we need to track raw files in a different way in the future, will add an option then.

Here is how notifications that involve file landing jobs look like:

[github-actions]

Unit Test Coverage

File	Coverage [87.61%]	🍏
TaskResult.scala	100%	🍏
RawFileSource.scala	98.67%	🍏
MetastorePersistenceRaw.scala	98.23%	🍏
SparkSource.scala	94.49%	🍏
PipelineNotificationBuilderHtml.scala	91.69%	🍏
FsUtils.scala	84.57%	🍏
OrchestratorImpl.scala	82.44%	🍏
TaskRunnerBase.scala	79.92%	❌
ConcurrentJobRunnerImpl.scala	79.28%	❌

Total Project Coverage	83.3%	🍏

[yruslan]

Thanks for the review!