speedometer: Add support for Speedometer v2.1

Follow the guidance in Speedometer::description to add v2.1.

Reference: https://github.com/WebKit/WebKit/tree/main/PerformanceTests/Speedometer2.1

Signed-off-by: Metin Kaya <metin.kaya@arm.com>

wa/workloads/speedometer/LICENSE

@@ -1,8 +1,10 @@
 The speedometer_archive.tgz file is a tarball containing the following archives from WebKit:
 
-  the PerformanceTests/Speedometer directory state taken from https://github.com/WebKit/webkit as of:
+  the PerformanceTests/Speedometer{,2.1} directory state taken from https://github.com/WebKit/webkit as of:
   2.0:
     commit 5f402692d5f3406527dc107b5d20cc47dac929e8 Tue Jul 14 14:06:17 2020 +0000
+  2.1:
+    commit 7a7acedd6de93309eae61d40394f0fbbb886541e Wed Aug 13 00:53:31 2025 -0700
   3.0:
     commit 734c49b3d075dcc33f56becf3bde8aca5245b719 Mon Feb 24 09:00:53 2025 -0800
 

wa/workloads/speedometer/__init__.py

@@ -123,11 +123,11 @@ class Speedometer(Workload):
         ),
         Parameter(
             "version",
-            allowed_values=["2.0", "3.0"],
+            allowed_values=["2.0", "2.1", "3.0"],
             kind=str,
             default="2.0",
             description="""
-                  Speedometer version to run. Currently supports 2.0 and 3.0.
+                  Speedometer version to run. Currently supports 2.0, 2.1 and 3.0.
                   """,
         ),
     ]