Rust: Replace imports of internal.DataFlowImpl where possible.

Author: geoffw0

rust/ql/lib/codeql/rust/security/CleartextLoggingExtensions.qll

@@ -5,7 +5,7 @@
 
 import rust
 private import codeql.rust.dataflow.DataFlow
-private import codeql.rust.dataflow.internal.DataFlowImpl
+private import codeql.rust.dataflow.FlowSink
 private import codeql.rust.security.SensitiveData
 
 /**

rust/ql/lib/codeql/rust/security/HardcodedCryptographicValueExtensions.qll

@@ -5,7 +5,8 @@
 
 import rust
 private import codeql.rust.dataflow.DataFlow
-private import codeql.rust.dataflow.internal.DataFlowImpl
+private import codeql.rust.dataflow.FlowSource
+private import codeql.rust.dataflow.FlowSink
 private import codeql.rust.security.SensitiveData
 
 /**

rust/ql/lib/codeql/rust/security/SqlInjectionExtensions.qll

@@ -6,7 +6,7 @@
 
 import rust
 private import codeql.rust.dataflow.DataFlow
-private import codeql.rust.dataflow.internal.DataFlowImpl
+private import codeql.rust.dataflow.FlowSink
 private import codeql.rust.Concepts
 private import codeql.util.Unit
 

rust/ql/src/queries/summary/Stats.qll

@@ -4,7 +4,6 @@
 
 import rust
 private import codeql.rust.dataflow.DataFlow
-private import codeql.rust.dataflow.internal.DataFlowImpl
 private import codeql.rust.dataflow.internal.TaintTrackingImpl
 private import codeql.rust.internal.AstConsistency as AstConsistency
 private import codeql.rust.controlflow.internal.CfgConsistency as CfgConsistency