Upgraded scala 2 enums to scala 3 in pysrc2cpg (#5748)

* Upgraded scala 2 enums to scala 3 in pysrc2cpg

The custom toString override in memop is no longer needed since Scala 3 enums automatically provide the case name as the string representation.

* Update to use curly-brace style for enum

Author: SuperUserDone

joern-cli/frontends/pysrc2cpg/src/main/scala/io/joern/pysrc2cpg/CodeToCpg.scala

@@ -2,6 +2,7 @@ package io.joern.pysrc2cpg
 
 import io.shiftleft.codepropertygraph.generated.Cpg
 import io.shiftleft.passes.ForkJoinParallelCpgPass
+import io.joern.pysrc2cpg.PythonVersion.PythonV2AndV3
 import io.joern.pysrc2cpg.Py2Cpg.InputProvider
 import io.joern.pythonparser.PyParser
 import io.joern.x2cpg.ValidationMode

joern-cli/frontends/pysrc2cpg/src/main/scala/io/joern/pysrc2cpg/ContextStack.scala

@@ -1,7 +1,8 @@
 package io.joern.pysrc2cpg
 
 import io.joern.pysrc2cpg.ContextStack.transferLineColInfo
-import io.joern.pysrc2cpg.memop.*
+import io.joern.pysrc2cpg.memop.MemoryOperation
+import io.joern.pysrc2cpg.memop.MemoryOperation.{Del, Load, Store}
 import io.joern.x2cpg.frontendspecific.pysrc2cpg.Constants
 import io.shiftleft.codepropertygraph.generated.nodes
 import io.shiftleft.codepropertygraph.generated.nodes.*

joern-cli/frontends/pysrc2cpg/src/main/scala/io/joern/pysrc2cpg/PythonAstVisitor.scala

@@ -2,6 +2,7 @@ package io.joern.pysrc2cpg
 
 import PythonAstVisitor.{logger, metaClassSuffix, noLineAndColumn}
 import io.joern.pysrc2cpg.memop.*
+import io.joern.pysrc2cpg.memop.MemoryOperation.{Del, Load, Store}
 import io.joern.x2cpg.frontendspecific.pysrc2cpg.Constants.builtinPrefix
 import io.joern.pythonparser.{AstPrinter, ast}
 import io.joern.pythonparser.ast.{Arguments, MatchAs, iast, iexpr, istmt}
@@ -11,6 +12,7 @@ import io.shiftleft.codepropertygraph.generated.*
 import io.shiftleft.codepropertygraph.generated.nodes.{NewCall, NewIdentifier, NewNode, NewTypeDecl}
 import org.slf4j.LoggerFactory
 import io.shiftleft.codepropertygraph.generated.DiffGraphBuilder
+import PythonVersion.*
 
 import scala.collection.mutable
 
@@ -21,10 +23,9 @@ object MethodParameters {
 }
 case class MethodParameters(posStartIndex: Int, positionalParams: Iterable[nodes.NewMethodParameterIn])
 
-sealed trait PythonVersion
-object PythonV2      extends PythonVersion
-object PythonV3      extends PythonVersion
-object PythonV2AndV3 extends PythonVersion
+enum PythonVersion {
+  case PythonV2, PythonV3, PythonV2AndV3
+}
 
 class PythonAstVisitor(
   relFileName: String,

joern-cli/frontends/pysrc2cpg/src/main/scala/io/joern/pysrc2cpg/PythonAstVisitorHelpers.scala

@@ -1,8 +1,7 @@
 package io.joern.pysrc2cpg
 
-import io.joern.pysrc2cpg.memop.Load
 import io.joern.pysrc2cpg.memop.MemoryOperation
-import io.joern.pysrc2cpg.memop.Store
+import io.joern.pysrc2cpg.memop.MemoryOperation.{Del, Load, Store}
 import io.joern.pythonparser.{AstPrinter, ast}
 import io.joern.x2cpg.ValidationMode
 import io.shiftleft.codepropertygraph.generated.ControlStructureTypes

joern-cli/frontends/pysrc2cpg/src/main/scala/io/joern/pysrc2cpg/memop/MemoryOperation.scala

@@ -1,8 +1,5 @@
 package io.joern.pysrc2cpg.memop
 
-sealed trait MemoryOperation {
-  override def toString: String = getClass.getSimpleName
+enum MemoryOperation {
+  case Store, Load, Del
 }
-object Store extends MemoryOperation
-object Load  extends MemoryOperation
-object Del   extends MemoryOperation

joern-cli/frontends/pysrc2cpg/src/main/scala/io/joern/pysrc2cpg/memop/MemoryOperationCalculator.scala

@@ -19,6 +19,7 @@ import io.joern.pythonparser.ast.{
   TypeVarTuple
 }
 import io.joern.pythonparser.{AstVisitor, ast}
+import MemoryOperation.{Del, Load, Store}
 
 import scala.collection.mutable