PRS - Dynamically load graphs in generated reports

Updates the full report generation to optionally embed a url to the csvtosvg end point to create and display graphs on demand rather than generating them offline. This reduces the size of the reports by about 250x.

+ Updated GetCsvToSvgArgs to have different output formats (command line, url).
+ Added -useEmbeddedGraphUrl arg to specify inserting the url instead of fully inlining the graph. This is accompanied by -embeddedGraphUrlRoot to specify the base url to target.
+ Removed the concept and handling of external graphs as the code path wasn't used and didn't work.
+ Refactored GenerateReport to create a list of CsvSvgInfo objects to better handle the different formats (url, inline).
+ Updated command line handling to decoded − into '-' to fix an issue where negative numbers were treated as arguments.
+ Remove giant graphs from ReportTypes.xml as they're unused.

#rnx

#rb ben.woodhouse
#tests prt compare tests, manual testing

[CL 30677752 by tyler staples in ue5-main branch]

Engine/Source/Programs/CSVTools/CsvStats/CommandLineTool.cs

@@ -124,6 +124,9 @@ namespace CSVStats
 						i++;
 					}
 
+					// Decode negative values. This is necessary otherwise negative values are interpreted as separate args.
+					val = val.Replace("−", "-");
+
 					string argKey = arg.Substring(1).ToLower();
 					if (CommandLineArgs.ContainsKey(argKey))
 					{

Engine/Source/Programs/CSVTools/PerfReportTool/ReportGraph.cs

@@ -96,7 +96,6 @@ namespace PerfReportTool
 			title = element.GetRequiredAttribute<string>(vars, "title");
 			budget = new Optional<double>(element, "budget", vars);
 			inSummary = element.GetSafeAttribute<bool>(vars, "inSummary", false);
-			isExternal = element.GetSafeAttribute<bool>(vars, "external", false);
 			isInline = element.GetSafeAttribute<bool>(vars, "inline", false);
 			parent = element.GetSafeAttribute<string>(vars, "parent");
 			minFilterStatValue = new Optional<double>(element, "minFilterStatValue", vars);
@@ -115,7 +114,6 @@ namespace PerfReportTool
 		public string title;
 		public Optional<double> budget;
 		public bool inSummary;
-		public bool isExternal;
 		public Optional<double> minFilterStatValue;
 		public GraphSettings settings;