selftests/net: convert srv6_end_dt6_l3vpn_test.sh to run it in unique namespace
As the name \${rt-${rt}} may make reader confuse, convert the variable hs/rt in setup_rt/hs to hid, rid. Here is the test result after conversion. ]# ./srv6_end_dt6_l3vpn_test.sh ################################################################################ TEST SECTION: IPv6 routers connectivity test ################################################################################ TEST: Routers connectivity: rt-1 -> rt-2 [ OK ] TEST: Routers connectivity: rt-2 -> rt-1 [ OK ] ... TEST: Hosts isolation: hs-t200-4 -X-> hs-t100-2 [ OK ] Tests passed: 18 Tests failed: 0 Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Link: https://lore.kernel.org/r/20231213060856.4030084-5-liuhangbin@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>