JIT: Fix missing untag of BSBinaryReg in do_get_tail #6005

Job	Run time
run-tests (ubuntu-24.04, -s prime_smp, erlang:22, 22, true)	3m 38s
run-tests (ubuntu-24.04, -s prime_smp, 28, erlang:28)	5m 11s
run-tests (ubuntu-24.04, -s prime_smp, erlang:21, 21, true)	3m 28s
run-tests (ubuntu-24.04, -s prime_smp, 24, erlang:24)	4m 29s
run-tests (ubuntu-24.04, -s prime_smp, erlang:23, 23, true)	3m 24s
run-tests (macos-15, 28, /opt/homebrew/opt/erlang@28/bin:)	4m 59s
run-tests (ubuntu-24.04, -s prime_smp, 29, erlang:29)	5m 24s
run-tests (ubuntu-24.04, -s prime_smp, 27, erlang:27)	5m 8s
run-tests (macos-15, 26, /opt/homebrew/opt/erlang@26/bin:)	8m 9s
run-tests (macos-15, 27, /opt/homebrew/opt/erlang@27/bin:)	5m 54s
run-tests (ubuntu-24.04, -s prime_smp, 25, erlang:25)	4m 46s
run-tests (ubuntu-24.04, -s prime_smp, 26, erlang:26)	5m 31s
	1h 0m 1s

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