VA: Add a method for performing MPIC compliant challenge validation #7198

Job	Run time
b (go1.23.1_2024-09-05, ./t.sh --lints --generate)	3m 29s
b (go1.23.1_2024-09-05, ./t.sh --lints --generate)	3m 29s
govulncheck	21s
govulncheck	21s
vendorcheck (1.22.5)	21s
vendorcheck (1.22.5)	21s
b (go1.23.1_2024-09-05, ./t.sh --integration)	5m 49s
b (go1.23.1_2024-09-05, ./t.sh --integration)	5m 49s
b (go1.23.1_2024-09-05, ./tn.sh --integration)	8m 3s
b (go1.23.1_2024-09-05, ./tn.sh --integration)	8m 3s
b (go1.23.1_2024-09-05, ./t.sh --unit --enable-race-detection)	7m 44s
b (go1.23.1_2024-09-05, ./t.sh --unit --enable-race-detection)	7m 44s
b (go1.23.1_2024-09-05, ./tn.sh --unit --enable-race-detection)	7m 59s
b (go1.23.1_2024-09-05, ./tn.sh --unit --enable-race-detection)	7m 51s
b (go1.23.1_2024-09-05, ./t.sh --start-py)	2m 50s
b (go1.23.1_2024-09-05, ./t.sh --start-py)	2m 50s
Boulder CI Test Matrix	1s
Boulder CI Test Matrix	1s
	1h 13m 6s

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