sa: Add GetOrderAuthorizations #9776

Job	Run time
govulncheck	17s
vendorcheck (1.25.5)	20s
b (go1.25.5_2025-12-03, ./tn.sh --integration)	7m 10s
b (go1.25.5_2025-12-03, ./t.sh --lints --generate)	3m 4s
b (go1.25.5_2025-12-03, ./t.sh --unit --enable-race-detection)	7m 0s
b (go1.25.5_2025-12-03, ./t.sh --start-py)	2m 54s
b (go1.25.5_2025-12-03, USE_VITESS=true ./tn.sh --integration)	7m 17s
b (go1.25.5_2025-12-03, USE_VITESS=true ./t.sh --integration)	5m 59s
b (go1.25.5_2025-12-03, ./t.sh --integration)	5m 57s
b (go1.25.5_2025-12-03, ./tn.sh --unit --enable-race-detection)	6m 52s
b (go1.25.5_2025-12-03, USE_VITESS=true ./t.sh --unit --enable-race-detection)	6m 59s
b (go1.25.5_2025-12-03, USE_VITESS=true ./tn.sh --unit --enable-race-detection)	7m 6s
b (go1.25.5_2025-12-03, USE_VITESS=true ./t.sh --start-py)	3m 0s
Boulder CI Test Matrix	4s
	1h 3m 59s

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