Revert "bump execution-spec tests to 2.1.1 (#7050)" (#7051)

This reverts commit 71c9581b4f.

Signed-off-by: garyschulte <garyschulte@gmail.com>

ethereum/referencetests/build.gradle

@@ -170,7 +170,7 @@ dependencies {
   referenceTestImplementation project(path: ':testutil')
   referenceTestImplementation project(path: ':util')
   // the following will be resolved via custom ivy repository declared in root build.gradle
-  referenceTestImplementation 'ethereum:execution-spec-tests:2.1.1:fixtures@tar.gz'
+  referenceTestImplementation 'ethereum:execution-spec-tests:0.2.5:fixtures@tar.gz'
   referenceTestImplementation 'com.fasterxml.jackson.core:jackson-databind'
   referenceTestImplementation 'com.google.guava:guava'
   referenceTestImplementation 'io.tmio:tuweni-bytes'

gradle/verification-metadata.xml

@@ -1417,11 +1417,6 @@
             <sha256 value="1c67818ff9ad052f2da636c1f2e99fbb801191e56af9f1ee1ebe3997039d8186" origin="Generated by Gradle"/>
          </artifact>
       </component>
-      <component group="ethereum" name="execution-spec-tests" version="2.1.1">
-         <artifact name="execution-spec-tests-2.1.1-fixtures.tar.gz">
-            <sha256 value="817ca59a93dae2cd6458f015dfbc604d234bcbeca63ffe763bd5b5e27ff3c1a1" origin="Generated by Gradle"/>
-         </artifact>
-      </component>
       <component group="info.picocli" name="picocli" version="3.0.0">
          <artifact name="picocli-3.0.0.jar">
             <sha256 value="22dbbe287dd0ab9d4d519ac9f2dd909537b6daf279ac5962a3bad8c9dae61032" origin="Generated by Gradle"/>