Revert "stack.yaml: Update to lts-19.33 and aws-0.24"

Revert "stack.yaml: Update to lts-19.33 and aws-0.24"

This reverts commit 648e59cac2ea9ab6ea4b6cbc50ab30b34e4938b1.

Failed to build on windows, because

       In the dependencies for haskeline-0.8.2:
           Win32-2.11.1.0 from Stack configuration does not match >=2.1 && <2.10 || >=2.12 (latest
                          matching version is 2.13.4.0)

jkniiv did find a solution that builds:

-- Win32-2.11.1.0
+- Win32-2.9.0.0
+- Cabal-3.6.3.0
+- directory-1.3.7.1
+- process-1.6.17.0
+- time-1.11.1.2

But that is a quite old version of Win32 and risks bugs from it, and bumping
Cabal and directory to newer than lts-19.33 has seems also likely to be risky.

So, I've given up. aws-0.24 won't be able to be in the stack build until
there's a stackage lts (or nightly) that has filepath (>=1.4.100.0),
which will not happen until sometime after the next ghc release.