test: update http2 test 008_03 for curl allowing the server to send a… #426

Job	Run time
Empty APLOGNO() test	41s
Default	4m 3s
All-static modules	5m 15s
Prefork MPM, all-modules (except cgid)	5m 29s
Worker MPM, all-modules	5m 17s
Shared MPMs, all-modules	5m 55s
Event MPM, all-modules, mod_cgid only	5m 12s
Event MPM, all-modules, no CMSG_DATA	4m 51s
Default, all-modules + install	5m 21s
Default, all-modules, random test order	6m 10s
GCC 10 maintainer-mode w/-Werror, install + VPATH	4m 58s
All-modules, APR 1.7.4, APR-util 1.6.3	4m 43s
APR 1.8.x, APR-util 1.7.x	7m 57s
Pool-debug	6m 56s
Shared MPMs (event), pool-debug, SSL/TLS variants	10m 42s
Shared MPMs (worker), pool-debug, SSL/TLS variants	10m 32s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	10m 53s
litmus WebDAV tests	3m 6s
Regenerate ap_expr	4m 32s
APR 1.7.4, APR-util 1.6.3, LDAP	4m 59s
APR trunk thread debugging	5m 0s
UBSan	5m 43s
ASan	9m 41s
ASan, pool-debug	8m 17s
HTTP/2 test suite	13m 0s
MOD_TLS test suite	1m 23s
	2h 40m 36s

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