revert the branch for commit into small chunks (#331)

* Support RVV Features including intrinsic and auto-vectorization
  Enable RVV intrinsic support:
   Users can use #pragma riscv intrinsic "vector"
   or #include <riscv_vector.h>
  Enable auto-vectorization support:
   use -mrvv compile option.
  Enable VLS auto-vectorization support:
   use -mrvv -mriscv-vector-bits=128/.../65536

* delete loadstore tests because it has too many files
  we will refine the tests and add them later.
  add len_* vcond_mask_vs and len_* vcond_mask_sv support

* delete the rvv tests

* add rvv testcases

* delete rvv testcase again

* add rvv testcase for the next update

* Revert "Daily bump."

This reverts commit 0d31c8ec.