Refactor mqtt5 fleet provisioning sample further #2270

Job	Run time
check-codegen-edits	4s
check-docs	3m 38s
byo-crypto	2m 34s
check-submodules	7s
clang-sanitizers (tsan)	8m 58s
linux-compat (manylinux2014-x64)	4m 56s
clang-sanitizers (asan)	10m 0s
linux-compat (manylinux2014-x86)	5m 22s
linux-compiler-compat (clang-3)	7m 39s
linux-compat (al2-x64)	5m 26s
linux-compiler-compat (clang-6)	5m 50s
linux-github-actions	8m 53s
linux-compat (alpine-3.16-x64)	8m 3s
linux-compiler-compat (clang-8)	6m 28s
linux-compat (alpine-3.16-x86)	9m 40s
linux-compiler-compat (clang-9)	6m 19s
linux-compat (alpine-3.16-armv6)	1h 2m 23s
linux-greengrass-tests	9m 19s
linux-compiler-compat (clang-10)	8m 41s
linux-compat (alpine-3.16-armv7)	1h 4m 6s
linux-compiler-compat (clang-11)	6m 20s
linux-compat (alpine-3.16-arm64)	1h 8m 3s
linux-no-cpu-extensions	5m 48s
linux-compiler-compat (gcc-4.8)	5m 22s
linux-smoke-tests	7m 45s
osx (macos-13)	12m 9s
linux-compiler-compat (gcc-5)	5m 1s
raspberry (raspbian-bullseye)	31m 36s
windows	3m 23s
osx (macos-latest)	7m 0s
linux-compiler-compat (gcc-6)	5m 30s
linux-compiler-compat (gcc-7)	4m 58s
linux-compiler-compat (gcc-8)	6m 37s
windows-app-verifier	3m 0s
windows-no-cpu-extensions	2m 59s
windows-shared-lib	3m 45s
windows-vs14 (Win32)	3m 52s
windows-vs14 (x64)	3m 45s
	7h 5m 19s

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