[I-Build-Test] Remove CPU-arch as criterion for testPlatform property

All usages depending on the 'testPlatform' variable don't distinguish
between architectures.
In case it is attempted to run the tests on a unsupported arch, checking
the architecture too produces an explicit error message instead of just
having a download that fails because the corresponding artifacts are not
available. But those that run I-builds locally or configure a new
platform are usually well aware if the executing architecture is
supported or not.
And testing for the arch just makes it more complicated to run tests on
new platforms.

Author: HannesWell

production/testScripts/runTests2.xml

@@ -199,11 +199,6 @@
         <equals
           arg1="${osgi.ws}"
           arg2="win32" />
-        <or>
-          <equals
-            arg1="${osgi.arch}"
-            arg2="x86_64" />
-        </or>
       </and>
     </condition>
 
@@ -217,17 +212,6 @@
         <equals
           arg1="${osgi.ws}"
           arg2="gtk" />
-        <or>
-          <equals
-            arg1="${osgi.arch}"
-            arg2="x86_64" />
-          <equals
-            arg1="${osgi.arch}"
-            arg2="ppc64le" />
-          <equals
-            arg1="${osgi.arch}"
-            arg2="aarch64" />
-        </or>
       </and>
     </condition>
     <condition
@@ -240,14 +224,6 @@
         <equals
           arg1="${osgi.ws}"
           arg2="cocoa" />
-        <or>
-          <equals
-            arg1="${osgi.arch}"
-            arg2="x86_64" />
-          <equals
-            arg1="${osgi.arch}"
-            arg2="aarch64" />
-       	</or>
       </and>
     </condition>
     <echo message="[DEBUG] in runTest2.xml: os ws arch ${osgi.os} ${osgi.ws} ${osgi.arch}" />
@@ -267,7 +243,7 @@
       use mirror URLs? (though, that'd not effect production) -->
     <fail
       unless="testPlatform"
-      message="testPlatform did not match any of the supported combinations of osgi.os, osgi.ws, osgi.arch" />
+      message="testPlatform did not match any of the supported combinations of osgi.os, osgi.ws" />
     <condition
       property="getArtifacts"
       value="getwinzips">