Add config tests for including provider config files #84

Job	Run time
check_docs	55s
check_update	2m 28s
address_ub_sanitizer	9m 52s
basic_clang	7m 28s
basic_gcc	8m 8s
check-ansi	5m 24s
minimal	4m 5s
no-deprecated	4m 40s
non-caching	18m 47s
no-shared (ubuntu-latest)	3m 45s
no-shared (macos-latest)	6m 49s
buildtest	10m 9s
enable_brotli_and_zstd_dynamic	9m 54s
enable_brotli_and_asan_ubsan	13m 44s
enable_brotli_dynamic	7m 42s
enable_non-default_options	4m 29s
enable_zstd_and_asan_ubsan	17m 25s
enable_zstd_dynamic	7m 25s
enable-tfo (ubuntu-latest)	7m 10s
fips_and_ktls	7m 51s
enable-tfo (macos-latest)	11m 18s
fuzz_tests	5m 0s
legacy	5m 56s
memory_sanitizer	23m 16s
no-legacy	5m 3s
threads_sanitizer	7m 53s
external-test-cf-quiche	7m 18s
external-test-pyca (1.51.0, 3.9)	15m 58s
external-tests	17m 20s
out-of-source-and-install (ubuntu-latest)	9m 57s
out-of-source-and-install (macos-latest)	10m 37s
	4h 37m 46s

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