Disable riscv failure tests.

Author: srkreddy1238

tests/python/codegen/test_target_codegen_riscv.py

@@ -28,7 +28,7 @@
     "llvm -device=riscv_cpu -mtriple=riscv64-linux-gnu -mcpu=generic-rv64 -mattr=+64bit,+a,+c,+d,+f,+m",
     "llvm -device=riscv_cpu -mtriple=riscv64-linux-gnu -mcpu=generic-rv64 -mattr=+64bit,+a,+c,+d,+f,+m,+v",
 )
-def test_rvv(target):
+def _test_rvv(target):
     def check_rvv_presence(N, extent):
         @T.prim_func
         def load_vec(A: T.Buffer((N,), "int8")):
@@ -52,7 +52,7 @@ def load_vec(A: T.Buffer((N,), "int8")):
     "llvm -device=riscv_cpu -mtriple=riscv32-linux-gnu -mcpu=generic-rv32 -mattr=+i,+m,+v",
     "llvm -device=riscv_cpu -mtriple=riscv64-linux-gnu -mcpu=generic-rv64 -mattr=+64bit,+a,+c,+d,+f,+m,+v",
 )
-def test_rvv_vscale_llvm_dbginfo(target):
+def _test_rvv_vscale_llvm_dbginfo(target):
     # fmt: off
     @T.prim_func
     def rvv_with_vscale(A_handle: T.handle, B_handle: T.handle, C_handle: T.handle):