feat(env): Migrate agent bootstrap to environment component

Author: PerfectSlayer

dd-java-agent/src/main/java/datadog/trace/bootstrap/AgentJar.java

@@ -1,5 +1,6 @@
 package datadog.trace.bootstrap;
 
+import datadog.environment.SystemProperties;
 import de.thetaphi.forbiddenapis.SuppressForbidden;
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -174,7 +175,7 @@ public static String getAgentVersion() throws IOException {
   }
 
   private static void checkProfilerEnv(final String[] args) throws Exception {
-    String tmpDir = args.length == 2 ? args[1] : System.getProperty("java.io.tmpdir");
+    String tmpDir = args.length == 2 ? args[1] : SystemProperties.get("java.io.tmpdir");
 
     installAgentCLI().getMethod("checkProfilerEnv", String.class).invoke(null, tmpDir);
   }

dd-java-agent/src/test/groovy/datadog/trace/agent/InitializationTelemetryTest.groovy

@@ -55,15 +55,15 @@ class InitializationTelemetryTest extends Specification {
 
   def "incomplete agent start-up"() {
     // In this case, the SecurityManager blocks a custom permission that is checked by bytebuddy causing
-    // agent initialization to fail.  However, we should catch the exception allowing the application
+    // agent initialization to fail. However, we should catch the exception allowing the application
     // to run normally.
     when:
     def result = InitializationTelemetryCheck.runTestJvm(InitializationTelemetryCheck.BlockByteBuddy)
 
     then:
     result.exitCode == 0
     !result.telemetryJson.contains('library_entrypoint.complete')
-    result.telemetryJson.contains('error_type:java.lang.IllegalStateException')
+    result.telemetryJson.contains('error_type:java.lang.reflect.InvocationTargetException')
   }
 
   def "block forwarder env var"() {