Fix casts

Fixes C-style, redundant, wrong, and dangerous casts (found by Clang-Tidy and cpplint).

- Remove redundant casts. (`readability-redundant-casting`)
- Remove `const_cast`. (`cppcoreguidelines-pro-type-const-cast`)
- Replace C-style casts with `static_cast`. (`google-readability-casting`, cpplint: `readability/casting`)
- Replace unsafe C-style casts with `dynamic_cast`. (`cppcoreguidelines-pro-type-cstyle-cast`)
- Replace `static_cast` in downcasts with `dynamic_cast`. (`cppcoreguidelines-pro-type-static-cast-downcast`)
- Replace `reinterpret_cast` with `static_cast` or `dynamic_cast`. (`cppcoreguidelines-pro-type-reinterpret-cast`)
- Replace two-step casting through `void*` with `reinterpret_cast`. (`bugprone-casting-through-void`)

Author: vkucera

Tools/KFparticle/qaKFEventTrack.cxx

@@ -247,7 +247,7 @@ struct qaKFEventTrack {
   template <typename T1, typename T2, typename T3, typename T4>
   void writeVarTree(const T1& /*kfpTrackPi*/, const T2& KFPion, const T2& KFPV, const T3& track, const int source, const int pVContrib, const int runNumber, const T4& collision)
   {
-    const double pseudoRndm = track.pt() * 1000. - (int64_t)(track.pt() * 1000);
+    const double pseudoRndm = track.pt() * 1000. - static_cast<int64_t>(track.pt() * 1000);
     if (pseudoRndm < d_DwnSmplFact) {
       if (writeTree) {
         /// Filling the tree
@@ -629,7 +629,7 @@ struct qaKFEvent {
       if (!isSelectedCollision(collisionIndex)) {
         continue;
       }
-      timeColl = uint64_t((bc.globalBC() - bc0) * o2::constants::lhc::LHCBunchSpacingNS) + collisionIndex.collisionTime();
+      timeColl = static_cast<uint64_t>((bc.globalBC() - bc0) * o2::constants::lhc::LHCBunchSpacingNS) + collisionIndex.collisionTime();
       writeVarTreeColl(collisionIndex, timeColl, bc.timestamp(), collisionIndex.collisionTime(), tfID);
     }
   }

Tools/KFparticle/qaKFParticleLc.cxx

@@ -416,7 +416,7 @@ struct qaKFParticleLc {
     float chi2geo = KFLc.GetChi2() / KFLc.GetNDF();
     float normdecayLength = KFLc_PV.GetDecayLength() / KFLc_PV.GetErrDecayLength();
     float chi2topo = KFLc_PV.GetChi2() / KFLc_PV.GetNDF();
-    const double pseudoRndm = trackKa.pt() * 1000. - (int64_t)(trackKa.pt() * 1000);
+    const double pseudoRndm = trackKa.pt() * 1000. - static_cast<int64_t>(trackKa.pt() * 1000);
     if (pseudoRndm < d_DwnSmplFact) {
       /// Filling the D0 tree
       rowKFLc(runNumber,