use v4 for upload-artifact and download-artifact #947

Job	Run time
Clean up previous branch jobs	6s
Package builder app	6s
Unit Tests	3s
release_notes (aws-crt-python)	43s
compilers (clang-9)	1m 7s
release_notes (aws-iot-device-sdk-python-v2)	3s
cross_compile (linux-armv6)	10m 27s
compilers (clang-10)	41s
aws-c-cal (manylinux1-x86)	8s
cross_compile (linux-armv7)	10m 26s
compilers (clang-11)	33s
aws-c-cal (manylinux1-x64)	12s
cross_compile (linux-armv8)	7m 52s
compilers (gcc-7)	1m 1s
aws-c-cal (manylinux2014-x86)	11s
compilers (gcc-8)	47s
downstream (aws-c-mqtt)	11m 31s
aws-c-cal (manylinux2014-x64)	8s
compilers (gcc-9)	34s
downstream (aws-c-http)	5m 15s
aws-c-cal (manylinux2014-aarch64)	9s
compilers (gcc-10)	35s
downstream (aws-crt-python)	6m 28s
aws-c-cal (musllinux-1-1-aarch64)	8s
Sanity Test (ubuntu-22.04)	1m 56s
compilers (gcc-11)	58s
downstream (aws-crt-cpp)	5m 47s
aws-c-cal (musllinux-1-1-x64)	11s
Sanity Test (macos-12)	4m 9s
downstream (aws-crt-java)	7m 19s
Sanity Test (macos-13)	3m 8s
downstream (aws-crt-nodejs)	6m 33s
Sanity Test (macos-14)	1m 29s
swift (swift-5-ubuntu-x64)	5s
Sanity Test (windows-2022)	2m 56s
swift (swift-5-centos-x64)	7s
swift (swift-5-al2-x64)	4s
std-compat (gcc-8, c++11)	5m 58s
std-compat (gcc-8, c++14)	5m 57s
std-compat (gcc-8, c++17)	7m 38s
std-compat (gcc-8, c++2a)	6m 4s
std-compat (clang-9, c++11)	6m 45s
std-compat (clang-9, c++14)	8m 23s
std-compat (clang-9, c++17)	6m 5s
std-compat (clang-9, c++2a)	6m 56s
All Sanity Tests passed	1s
	2h 27m 43s

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