Rename predicates to be consistent with qlpack

In preparation for migrating to the FlowSummary module in the qlpack,
rename predicates to be consistent with the qlpack.

javascript/ql/lib/semmle/javascript/dataflow/FlowSummary.qll

@@ -84,7 +84,7 @@ abstract class SummarizedCallable extends LibraryCallable, Impl::Public::Summari
   DataFlow::ParameterNode getParameter(string s) {
     exists(ParameterPosition pos |
       DataFlowImplCommon::parameterNode(result, MkLibraryCallable(this), pos) and
-      s = getParameterPosition(pos)
+      s = encodeParameterPosition(pos)
     )
   }
 }

javascript/ql/lib/semmle/javascript/dataflow/internal/FlowSummaryPrivate.qll

@@ -286,11 +286,15 @@ string getMadRepresentationSpecific(SummaryComponent sc) {
 
 /** Gets the textual representation of a parameter position in the format used for flow summaries. */
 bindingset[pos]
-string getParameterPosition(ParameterPosition pos) { positionName(pos, result) and result != "any" }
+string encodeParameterPosition(ParameterPosition pos) {
+  positionName(pos, result) and result != "any"
+}
 
 /** Gets the textual representation of an argument position in the format used for flow summaries. */
 bindingset[pos]
-string getArgumentPosition(ArgumentPosition pos) { positionName(pos, result) and result != "any" }
+string encodeArgumentPosition(ArgumentPosition pos) {
+  positionName(pos, result) and result != "any"
+}
 
 /** Holds if input specification component `c` needs a reference. */
 predicate inputNeedsReferenceSpecific(string c) { none() }

javascript/ql/lib/semmle/javascript/dataflow/internal/sharedlib/FlowSummaryImpl.qll

@@ -30,12 +30,12 @@ module Public {
       or
       exists(ArgumentPosition pos |
         this = TParameterSummaryComponent(pos) and
-        result = "Parameter[" + getArgumentPosition(pos) + "]"
+        result = "Parameter[" + encodeArgumentPosition(pos) + "]"
       )
       or
       exists(ParameterPosition pos |
         this = TArgumentSummaryComponent(pos) and
-        result = "Argument[" + getParameterPosition(pos) + "]"
+        result = "Argument[" + encodeParameterPosition(pos) + "]"
       )
       or
       exists(string synthetic |