feat: add generated SPDX file on bottling #26460

Job	Run time
syntax	39s
tap syntax	4m 48s
formula audit	6m 25s
cask audit	2m 35s
docker	4m 14s
test default formula (Ubuntu 22.04)	3m 59s
tests (online)	7m 41s
test default formula (Ubuntu 20.04)	5m 45s
update-test (Ubuntu 22.04)	1m 9s
vendored gems	54s
tests (generic OS)	5m 38s
test default formula (macOS 13 x86_64)	2m 46s
update-test (macOS 13)	51s
test default formula (macOS 14 arm64)	1m 12s
tests (Ubuntu 22.04)	5m 52s
tests (Ubuntu 20.04)	6m 27s
tests (macOS 13 x86_64)	6m 36s
tests (macOS 14 arm64)	5m 27s
	1h 12m 58s

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