[Clang][RISCV] Update all RVV intrinsic auto-generated test case with new script. NFC

This commit updates all intrinsics under
`clang/test/CodeGen/RISCV/rvv-intrinsics-autogenerated` because the
new script of `update_llc_test_checks.py` is generating many new lines
differently.

This NFC commit updates the test cases in a whole batch.

Signed-off by: eop Chen <eop.chen@sifive.com>