fix(redirect): fix the blockCommit condition

[Anzooooo]

The frontend needs to send redirect before sending commit.
When flushPipe occurs continuously, it may not meet the above condition in some cases, so this logic is added.

[XiangShanRobot]

[Generated by IPC robot]
commit: a73e677

commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
a73e677	1.959	0.450	2.686	1.237	2.832	2.461	2.393	0.919	1.407	1.992	3.435	2.709	2.383	3.261

master branch:

commit	astar	copy_and_run	coremark	gcc	gromacs	lbm	linux	mcf	microbench	milc	namd	povray	wrf	xalancbmk
2bff79a			2.687					0.919	1.407					3.261
02d2ded	1.959	0.450	2.686	1.228	2.832	2.461	2.393	0.919	1.407	1.992	3.435	2.709	2.383	3.261
4aa305e	1.959	0.450	2.687	1.232	2.832	2.461	2.393	0.919	1.407	1.992	3.434	2.709	2.383	3.261
189833a	1.959	0.450	2.686	1.231	2.832	2.461	2.393	0.919	1.407	1.992	3.434	2.709	2.383	3.261
e10e20c	1.959	0.450	2.687	1.228	2.832	2.461	2.393	0.919	1.407	1.992	3.435	2.709	2.383	3.261