Ensure net.bytebuddy.raw is set to true when ConfigTransformSpockExtension is installed (#8728)

This matches the same setting used by AgentInstaller which avoids spurious test failures
in agent-tooling, specifically TypeFactoryForkedTest. This requires raw-types enabled to
match the behaviour when installing the tracer with -javaagent. Without this byte-buddy
will use dufferent code paths involving generic checks, which can lead to test failures
using recent versions of byte-buddy (specifically going between full and outline types,
where outlines are always raw-types by their nature.)

These failures would not happen when using -javaagent because AgentInstaller forces the
use of the raw-types setting. ConfigTransformSpockExtension should therefore do the same.

Note we can't set this property in TypeFactoryForkedTest because by then it is too late,
byte-buddy is already confgured by ConfigTransformSpockExtension and the raw-types value
cannot be changed.

Author: mcculls

utils/test-utils/src/main/groovy/datadog/trace/test/util/ConfigTransformSpockExtension.groovy

@@ -18,6 +18,11 @@ import static net.bytebuddy.matcher.ElementMatchers.none
  * Transforms the Config class to make its INSTANCE field non-final and volatile.
  */
 class ConfigTransformSpockExtension implements IGlobalExtension {
+  static {
+    // same setting as AgentInstaller to avoid spurious agent-tooling test failures
+    System.setProperty("net.bytebuddy.raw", "true")
+  }
+
   static final String INST_CONFIG = "datadog.trace.api.InstrumenterConfig"
   static final String CONFIG = "datadog.trace.api.Config"