Use parallel protocol-state-fuzzer & update CI tests to use 8 threads #1177

Job	Run time
ETinyDTLS_Server_psk	8m 2s
CTinyDTLS_Server_psk	7m 57s
CTinyDTLS_Client_psk	5m 18s
WolfSSL-4-7-1r_DTLS-1-2_Server_psk	8m 8s
JSSE-12-0-2_Server_ecdhe_cert_req	16m 32s
JSSE-12-0-2_Client_ecdhe_cert	24m 48s
Scandium-2-0-0-M16_Client_ecdhe_cert	5m 8s
WolfSSL-5-7-6_DTLS-1-2_Server_psk	7m 14s
Scandium-2-0-0-M16_Server_ecdhe_cert_req	14m 8s
Mbedtls-2-26-0_Client_dhe_ecdhe_rsa_eneg	9m 37s
ETinyDTLS_Client_psk	7m 8s
OpenSSL-1-1-1k_Server_all_cert_req	9m 13s
PionDTLS-2-0-9_Server_psk	7m 35s
PionDTLS-2-0-9_Client_psk	7m 35s
Mbedtls-2-26-0_Server_all_cert_req	9m 37s
WolfSSL-4-7-1r_DTLS-1-2_Client_psk	8m 58s
OpenSSL-1-1-1k_Client_dhe_ecdhe_rsa_eneg	6m 14s
WolfSSL-5-7-6_DTLS-1-3_Server_dhe_cert_nreq	5m 29s
WolfSSL-5-7-6_DTLS-1-3_Server_psk	5m 45s
WolfSSL-5-7-6_DTLS-1-2_Client_psk	9m 33s
WolfSSL-5-7-6_DTLS-1-3_Server_dhe_cert_req	9m 2s
WolfSSL-5-7-6_DTLS-1-3_Client_dhe_cert_nreq	11m 11s
WolfSSL-5-7-6_DTLS-1-3_Client_psk	6m 7s
WolfSSL-5-7-6_DTLS-1-3_Client_dhe_cert_req	12m 57s
	3h 43m 16s

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