Add config tests for including provider config files #83

Job	Run time
check_update	1m 35s
address_ub_sanitizer	10m 23s
basic_clang	7m 40s
basic_gcc	9m 37s
check_docs	57s
check-ansi	5m 24s
fuzz_tests	6m 54s
memory_sanitizer	19m 40s
minimal	2m 24s
no-deprecated	9m 26s
non-caching	23m 7s
no-shared (ubuntu-latest)	5m 55s
no-shared (macos-latest)	5m 11s
threads_sanitizer	7m 27s
buildtest	13m 55s
enable_brotli_and_asan_ubsan	13m 48s
enable_brotli_and_zstd_dynamic	7m 18s
enable_brotli_dynamic	7m 31s
enable_non-default_options	6m 53s
enable_zstd_and_asan_ubsan	16m 39s
enable_zstd_dynamic	9m 53s
enable-tfo (ubuntu-latest)	8m 46s
enable-tfo (macos-latest)	6m 35s
external-test-pyca (1.51.0, 3.9)	13m 19s
external-tests	11m 50s
fips_and_ktls	9m 23s
legacy	6m 4s
no-legacy	10m 20s
out-of-source-and-install (ubuntu-latest)	10m 12s
out-of-source-and-install (macos-latest)	10m 17s
external-test-cf-quiche	6m 50s
	4h 45m 13s

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