RISC-V: Add VLS mask modes mov patterns

RISC-V: Add VLS mask modes mov patterns

This patterns fix these following ICE FAILs when running the whole GCC testsuite
with enabling scalable vector by default.

All of these FAILs are fixed:
FAIL: c-c++-common/opaque-vector.c  -std=c++14 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/opaque-vector.c  -std=c++14 (test for excess errors)
FAIL: c-c++-common/opaque-vector.c  -std=c++17 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/opaque-vector.c  -std=c++17 (test for excess errors)
FAIL: c-c++-common/opaque-vector.c  -std=c++20 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/opaque-vector.c  -std=c++20 (test for excess errors)
FAIL: c-c++-common/opaque-vector.c  -std=c++98 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/opaque-vector.c  -std=c++98 (test for excess errors)
FAIL: c-c++-common/pr105998.c  -std=c++14 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/pr105998.c  -std=c++14 (test for excess errors)
FAIL: c-c++-common/pr105998.c  -std=c++17 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/pr105998.c  -std=c++17 (test for excess errors)
FAIL: c-c++-common/pr105998.c  -std=c++20 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/pr105998.c  -std=c++20 (test for excess errors)
FAIL: c-c++-common/pr105998.c  -std=c++98 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/pr105998.c  -std=c++98 (test for excess errors)
FAIL: c-c++-common/vector-scalar.c  -std=c++14 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/vector-scalar.c  -std=c++14 (test for excess errors)
FAIL: c-c++-common/vector-scalar.c  -std=c++17 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/vector-scalar.c  -std=c++17 (test for excess errors)
FAIL: c-c++-common/vector-scalar.c  -std=c++20 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/vector-scalar.c  -std=c++20 (test for excess errors)
FAIL: c-c++-common/vector-scalar.c  -std=c++98 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/vector-scalar.c  -std=c++98 (test for excess errors)
FAIL: g++.dg/ext/vector36.C  -std=gnu++14 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: g++.dg/ext/vector36.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/ext/vector36.C  -std=gnu++17 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: g++.dg/ext/vector36.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/ext/vector36.C  -std=gnu++20 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: g++.dg/ext/vector36.C  -std=gnu++20 (test for excess errors)
FAIL: g++.dg/ext/vector36.C  -std=gnu++98 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: g++.dg/ext/vector36.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/pr58950.C  -std=gnu++14 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: g++.dg/pr58950.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/pr58950.C  -std=gnu++17 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: g++.dg/pr58950.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/pr58950.C  -std=gnu++20 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: g++.dg/pr58950.C  -std=gnu++20 (test for excess errors)
FAIL: g++.dg/pr58950.C  -std=gnu++98 (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: g++.dg/pr58950.C  -std=gnu++98 (test for excess errors)
FAIL: c-c++-common/torture/builtin-shufflevector-2.c   -O0  (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/torture/vector-compare-2.c   -O0  (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/torture/vector-compare-2.c   -O0  (test for excess errors)
FAIL: g++.dg/torture/pr104450.C   -O0  (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: g++.dg/torture/pr104450.C   -O0  (test for excess errors)

FAIL: gcc.dg/analyzer/pr96713.c (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: gcc.dg/analyzer/pr96713.c (test for excess errors)
FAIL: c-c++-common/opaque-vector.c  -Wc++-compat  (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/opaque-vector.c  -Wc++-compat  (test for excess errors)
FAIL: c-c++-common/pr105998.c  -Wc++-compat  (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/pr105998.c  -Wc++-compat  (test for excess errors)
FAIL: c-c++-common/vector-scalar.c  -Wc++-compat  (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: c-c++-common/vector-scalar.c  -Wc++-compat  (test for excess errors)
FAIL: gcc.dg/pr100239.c (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: gcc.dg/pr100239.c (test for excess errors)
FAIL: gcc.dg/pr97238.c (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: gcc.dg/pr97238.c (test for excess errors)
FAIL: c-c++-common/torture/builtin-shufflevector-2.c   -O0  (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: gcc.dg/torture/pr70310.c   -O0  (internal compiler error: in emit_move_multi_word, at expr.cc:4079)
FAIL: gcc.dg/torture/pr70310.c   -O0  (test for excess errors)

gcc/ChangeLog:

	* config/riscv/autovec-vls.md: Add VLS mask modes mov patterns.
	* config/riscv/riscv.md: Ditto.
	* config/riscv/vector-iterators.md: Ditto.
	* config/riscv/vector.md: Ditto.