va: prepare to require minimum of 3 RVAs #7234

Job	Run time
b (go1.23.1_2024-09-05, ./t.sh --lints --generate)	3m 25s
b (go1.23.1_2024-09-05, ./t.sh --lints --generate)	3m 25s
govulncheck	20s
govulncheck	20s
vendorcheck (1.22.5)	13s
vendorcheck (1.22.5)	13s
b (go1.23.1_2024-09-05, ./t.sh --integration)	5m 46s
b (go1.23.1_2024-09-05, ./t.sh --integration)	5m 46s
b (go1.23.1_2024-09-05, ./tn.sh --integration)	7m 54s
b (go1.23.1_2024-09-05, ./tn.sh --integration)	7m 54s
b (go1.23.1_2024-09-05, ./t.sh --unit --enable-race-detection)	7m 33s
b (go1.23.1_2024-09-05, ./t.sh --unit --enable-race-detection)	7m 33s
b (go1.23.1_2024-09-05, ./tn.sh --unit --enable-race-detection)	7m 57s
b (go1.23.1_2024-09-05, ./tn.sh --unit --enable-race-detection)	7m 52s
b (go1.23.1_2024-09-05, ./t.sh --start-py)	2m 44s
b (go1.23.1_2024-09-05, ./t.sh --start-py)	2m 44s
Boulder CI Test Matrix	1s
Boulder CI Test Matrix	1s
	1h 11m 41s

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