feat(loong64): encode the full LSX and LASX table

Assisted-by: GLM 5.3 Flash

testdata/verify/vector_interleave_loong64.s

@@ -0,0 +1,68 @@
+// Differential kernel: the interleave vector slice against the Go
+// toolchain's loong64enc1.s rows (gasm v. go tool asm, byte for byte).
+
+#include "textflag.h"
+
+TEXT ·VILVLB(SB), NOSPLIT, $0
+	VILVLB V1, V2, V3
+	RET
+
+TEXT ·VILVLH(SB), NOSPLIT, $0
+	VILVLH V1, V2, V3
+	RET
+
+TEXT ·VILVLW(SB), NOSPLIT, $0
+	VILVLW V1, V2, V3
+	RET
+
+TEXT ·VILVLV(SB), NOSPLIT, $0
+	VILVLV V1, V2, V3
+	RET
+
+TEXT ·VILVHB(SB), NOSPLIT, $0
+	VILVHB V1, V2, V3
+	RET
+
+TEXT ·VILVHH(SB), NOSPLIT, $0
+	VILVHH V1, V2, V3
+	RET
+
+TEXT ·VILVHW(SB), NOSPLIT, $0
+	VILVHW V1, V2, V3
+	RET
+
+TEXT ·VILVHV(SB), NOSPLIT, $0
+	VILVHV V1, V2, V3
+	RET
+
+TEXT ·XVILVLB(SB), NOSPLIT, $0
+	XVILVLB X3, X2, X1
+	RET
+
+TEXT ·XVILVLH(SB), NOSPLIT, $0
+	XVILVLH X3, X2, X1
+	RET
+
+TEXT ·XVILVLW(SB), NOSPLIT, $0
+	XVILVLW X3, X2, X1
+	RET
+
+TEXT ·XVILVLV(SB), NOSPLIT, $0
+	XVILVLV X3, X2, X1
+	RET
+
+TEXT ·XVILVHB(SB), NOSPLIT, $0
+	XVILVHB X3, X2, X1
+	RET
+
+TEXT ·XVILVHH(SB), NOSPLIT, $0
+	XVILVHH X3, X2, X1
+	RET
+
+TEXT ·XVILVHW(SB), NOSPLIT, $0
+	XVILVHW X3, X2, X1
+	RET
+
+TEXT ·XVILVHV(SB), NOSPLIT, $0
+	XVILVHV X3, X2, X1
+	RET