[decode][mediasdk] Fix Coverity issues in decode and test components (CIDs 3568170, 3584109, 3301792, 3388910, 3403404, 3403405)

- CID 3568170 (RULE_OF_ZERO_THREE_FIVE): Add delete move constructor and move
  assignment operator to DecVppSfc to satisfy Rule of Five. Class already
  explicitly defines copy ctor, copy assign, and destructor.

- CID 3584109 (MISSING_LOCK): Add std::lock_guard<std::mutex> guard(m_mGuard)
  in GetDecodeStat before accessing decoder->m_stat to protect against
  concurrent modification.

- CID 3301792 (COPY_INSTEAD_OF_MOVE): Use std::move(dpb) at last use in
  PackAU to avoid an unnecessary copy of the DPB list when passing to
  PackSliceParam (dpb is not used after this call).

- CIDs 3388910, 3403404, 3403405 (COPY_INSTEAD_OF_MOVE): Use std::move in
  Field constructor and STRUCT macro to avoid redundant copies when
  constructing tsStruct Field objects from std::string _name parameter.

False positives (no fix needed):
- CID 3584110 (MISSING_LOCK): Decode routine is intentionally called
  concurrently by scheduler threads; adding a lock would break parallelism.
- CIDs 3390335, 3390336 (SLEEP): Same pattern as H265/H264 decoders;
  SurfaceSource::Reset/Close under m_guard is by design.
- CID 3583235 (INTEGER_OVERFLOW): size >= 1 is guaranteed by loop break at
  line 168, so size -= 1 cannot underflow.

Coverity: CIDs 3568170, 3584109, 3301792, 3388910, 3403404, 3403405

Author: stellawuintel

_studio/shared/umc/codec/vvc_dec/src/umc_vvc_va_packer_vaapi.cpp

@@ -953,7 +953,7 @@ namespace UMC_VVC_DECODER
         PackSliceStructParams(sliceStruct, pFirstSlice);
 
         // slice control buffer packing
-        PackSliceParam(picParam,dpb,pSliceInfo);
+        PackSliceParam(picParam,std::move(dpb),pSliceInfo);
 
         // Mark APS after sending buffer pack
         pFirstSlice->MarkAPS();