Test: Handle 'problems' result set as an alias for '#select'

Author: asgerf

shared/util/codeql/util/test/InlineExpectationsTest.qll

@@ -583,6 +583,9 @@ private string expectationPattern() {
   )
 }
 
+/** Gets the string `#select` or `problems`, which are equivalent result sets for a `problem` or `path-problem` query. */
+private string mainResultSet() { result = ["#select", "problems"] }
+
 /**
  * Provides logic for creating a `@kind test-postprocess` query that checks
  * inline test expectations using `$ Alert` markers.
@@ -650,8 +653,8 @@ module TestPostProcessing {
      */
     private string getSourceTag(int row) {
       getQueryKind() = "path-problem" and
-      exists(string loc | queryResults("#select", row, 2, loc) |
-        if queryResults("#select", row, 0, loc) then result = "Alert" else result = "Source"
+      exists(string loc | queryResults(mainResultSet(), row, 2, loc) |
+        if queryResults(mainResultSet(), row, 0, loc) then result = "Alert" else result = "Source"
       )
     }
 
@@ -663,8 +666,8 @@ module TestPostProcessing {
      */
     private string getSinkTag(int row) {
       getQueryKind() = "path-problem" and
-      exists(string loc | queryResults("#select", row, 4, loc) |
-        if queryResults("#select", row, 0, loc) then result = "Alert" else result = "Sink"
+      exists(string loc | queryResults(mainResultSet(), row, 4, loc) |
+        if queryResults(mainResultSet(), row, 0, loc) then result = "Alert" else result = "Sink"
       )
     }
 
@@ -717,8 +720,8 @@ module TestPostProcessing {
       ) {
         getQueryKind() = "path-problem" and
         exists(string loc |
-          queryResults("#select", row, 2, loc) and
-          queryResults("#select", row, 3, element) and
+          queryResults(mainResultSet(), row, 2, loc) and
+          queryResults(mainResultSet(), row, 3, element) and
           tag = getSourceTag(row) and
           value = "" and
           Input2::getRelativeUrl(location) = loc
@@ -757,8 +760,8 @@ module TestPostProcessing {
       ) {
         getQueryKind() = "path-problem" and
         exists(string loc |
-          queryResults("#select", row, 4, loc) and
-          queryResults("#select", row, 5, element) and
+          queryResults(mainResultSet(), row, 4, loc) and
+          queryResults(mainResultSet(), row, 5, element) and
           tag = getSinkTag(row) and
           Input2::getRelativeUrl(location) = loc
         )
@@ -767,8 +770,8 @@ module TestPostProcessing {
       private predicate hasAlert(int row, Input::Location location, string element, string tag) {
         getQueryKind() = ["problem", "path-problem"] and
         exists(string loc |
-          queryResults("#select", row, 0, loc) and
-          queryResults("#select", row, 2, element) and
+          queryResults(mainResultSet(), row, 0, loc) and
+          queryResults(mainResultSet(), row, 2, element) and
           tag = "Alert" and
           Input2::getRelativeUrl(location) = loc and
           not hasPathProblemSource(row, location, _, _, _) and