Merge pull request #21775 from luzpaz:typos/gapi

* GAPI: fix various gapi related typos

Fixes source comments and documentation related to gapi code.

* Fix source typos

* Fixed typos requested

* Follow-up typo fix

modules/gapi/src/compiler/gislandmodel.cpp

@@ -346,9 +346,9 @@ std::string GIslandModel::traceIslandName(const ade::NodeHandle& island_nh, cons
     auto& backend_impl = island_ptr->backend().priv();
     std::string backend_impl_type_name = typeid(backend_impl).name();
 
-    // NOTE: Major part of already existing backends implementaion classes are called using
+    // NOTE: Major part of already existing backends implementation classes are called using
     //       "*G[Name]BackendImpl*" pattern.
-    //       We are trying to match against this pattern and retrive just [Name] part.
+    //       We are trying to match against this pattern and retrieve just [Name] part.
     //       If matching isn't successful, full mangled class name will be used.
     //
     //       To match we use following algorithm:

modules/gapi/src/compiler/passes/intrin.cpp

@@ -254,7 +254,7 @@ void apply(cv::gimpl::GModel::Graph &g) {
 }
 
 // Probably the simplest case: desync makes no sense in the regular
-// compilation process, so just drop all its occurences in the graph,
+// compilation process, so just drop all its occurrences in the graph,
 // reconnecting nodes properly.
 void drop(cv::gimpl::GModel::Graph &g) {
     // FIXME: LOG here that we're dropping the desync operations as

modules/gapi/src/compiler/passes/kernels.cpp

@@ -212,7 +212,7 @@ void cv::gimpl::passes::resolveKernels(ade::passes::PassContext   &ctx,
                 GAPI_Assert(op.k.outMeta == nullptr);
                 const_cast<cv::GKernel::M&>(op.k.outMeta) = selected_impl.outMeta;
             } else {
-                // Sanity check: the metadata funciton must be present
+                // Sanity check: the metadata function must be present
                 GAPI_Assert(op.k.outMeta != nullptr);
             }
         }