Do this by breaking up the monolithic `runDaily()` function, and combining errors from the new `postDailyResults()` and `postCoverageResults()` functions.

Bug: b/152192800
Change-Id: I031b37fa32d6d05ae1c38dff27a180c809aa4fe1
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/43649Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>