Store initial configuration and provide it in config() by default #3787

Job	Run time
build-lint-test (3.10, ubuntu-arm)	11m 16s
build-lint-test (3.14, ubuntu-latest)	19m 5s
test-latest-deps	10m 45s
build-lint-test (3.14, macos-arm)	10m 11s
build-lint-test (3.10, macos-arm)	11m 4s
build-lint-test (3.10, ubuntu-latest)	24m 37s
build-lint-test (3.14, ubuntu-arm)	10m 38s
build-lint-test (3.14, windows-latest)	17m 48s
build-lint-test (3.14, macos-intel)	24m 11s
build-lint-test (3.10, windows-latest)	19m 31s
features-tests / test	7m 21s
build-lint-test (3.10, macos-intel)	19m 33s
	3h 6m 0s

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