i386: Check vector length for EVEX vextractfXX and vinsertfXX

Since not all vector lengths are supported by EVEX vextractfXX and
vinsertfXX, decode them only with supported vector lengths.

gas/

	PR binutils/24633
	* testsuite/gas/i386/disassem.s: Add tests for invalid vector
	lengths for EVEX vextractfXX and vinsertfXX.
	* testsuite/gas/i386/x86-64-disassem.s: Likewise.
	* testsuite/gas/i386/disassem.d: Updated.
	* testsuite/gas/i386/x86-64-disassem.d: Likewise.

opcodes/

	PR binutils/24633
	* i386-dis-evex.h (evex_table): Update EVEX_W_0F3A18_P_2,
	EVEX_W_0F3A19_P_2, EVEX_W_0F3A1A_P_2 and EVEX_W_0F3A1B_P_2.
	(evex_len_table): EVEX_LEN_0F3A18_P_2_W_0,
	EVEX_LEN_0F3A18_P_2_W_1, EVEX_LEN_0F3A19_P_2_W_0,
	EVEX_LEN_0F3A19_P_2_W_1, EVEX_LEN_0F3A1A_P_2_W_0,
	EVEX_LEN_0F3A1A_P_2_W_1, EVEX_LEN_0F3A1B_P_2_W_0,
	EVEX_LEN_0F3A1B_P_2_W_1.
	* i386-dis.c (EVEX_LEN_0F3A18_P_2_W_0): New enum.
	(EVEX_LEN_0F3A18_P_2_W_1): Likewise.
	(EVEX_LEN_0F3A19_P_2_W_0): Likewise.
	(EVEX_LEN_0F3A19_P_2_W_1): Likewise.
	(EVEX_LEN_0F3A1A_P_2_W_0): Likewise.
	(EVEX_LEN_0F3A1A_P_2_W_1): Likewise.
	(EVEX_LEN_0F3A1B_P_2_W_0): Likewise.
	(EVEX_LEN_0F3A1B_P_2_W_1): Likewise.