policyfilter: do not mark as beta anymore #8954

Job	Run time
Build tetragon	9m 2s
Test kernel 5.15-20240620.102250 / test group 0	21m 34s
Test kernel 5.10-20240620.102250 / test group 0	21m 34s
Test kernel 4.19-20240620.102250 / test group 0	21m 36s
Test kernel 5.4-20240620.102250 / test group 0	21m 35s
Test kernel 6.6-20240620.102250 / test group 0	21m 35s
Test kernel 6.1-20240620.102250 / test group 0	21m 35s
Test kernel bpf-next-20240624.013140 / test group 0	21m 35s
Test kernel rhel8.9-20240806.173325 / test group 0	21m 33s
post-test	0s
	3h 1m 39s

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