aws-sdk-cpp: 1.4.65 -> 1.4.70

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/aws-sdk-cpp/versions.

These checks were done:

- built on NixOS

- 0 of 0 passed binary check by having a zero exit code.
- 0 of 0 passed binary check by having the new version present in output.
- found 1.4.70 with grep in /nix/store/az7vd5kvng3vgvdgn2ayk75and1gz4ll-aws-sdk-cpp-1.4.70
- directory tree listing: https://gist.github.com/d3c4e72fb9bc640c6c78344c7b6630b6
- du listing: https://gist.github.com/63d41f84084209f15d11cb23e00e5c3c