use v4 for upload-artifact and download-artifact #948

Job	Run time
Clean up previous branch jobs	5s
Unit Tests	6s
Package builder app	4s
Sanity Test (ubuntu-22.04)	1m 52s
compilers (clang-9)	1m 5s
Sanity Test (macos-12)	2m 34s
compilers (clang-10)	34s
compilers (clang-11)	34s
Sanity Test (macos-13)	3m 24s
compilers (gcc-7)	40s
Sanity Test (macos-14)	1m 28s
aws-c-cal (manylinux1-x86)	2m 25s
cross_compile (linux-armv6)	10m 46s
Sanity Test (windows-2022)	3m 4s
compilers (gcc-8)	41s
aws-c-cal (manylinux1-x64)	2m 14s
cross_compile (linux-armv7)	10m 57s
aws-c-cal (manylinux2014-x86)	2m 35s
compilers (gcc-9)	34s
cross_compile (linux-armv8)	7m 56s
aws-c-cal (manylinux2014-x64)	2m 36s
compilers (gcc-10)	39s
aws-c-cal (manylinux2014-aarch64)	24m 26s
compilers (gcc-11)	1m 31s
downstream (aws-c-mqtt)	10m 24s
aws-c-cal (musllinux-1-1-aarch64)	26m 50s
downstream (aws-c-http)	3m 31s
aws-c-cal (musllinux-1-1-x64)	2m 57s
release_notes (aws-crt-python)	41s
downstream (aws-crt-python)	5m 28s
release_notes (aws-iot-device-sdk-python-v2)	4s
downstream (aws-crt-cpp)	6m 1s
swift (swift-5-ubuntu-x64)	45s
downstream (aws-crt-java)	9m 24s
swift (swift-5-centos-x64)	41s
downstream (aws-crt-nodejs)	7m 46s
swift (swift-5-al2-x64)	38s
std-compat (gcc-8, c++11)	7m 55s
std-compat (gcc-8, c++14)	7m 15s
std-compat (gcc-8, c++17)	6m 13s
std-compat (gcc-8, c++2a)	6m 10s
std-compat (clang-9, c++11)	5m 52s
std-compat (clang-9, c++14)	6m 39s
std-compat (clang-9, c++17)	5m 49s
std-compat (clang-9, c++2a)	5m 36s
All Sanity Tests passed	1s
	3h 29m 30s

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