Only enable test if brotli is there (netty#12592)

Motiviation:

We should only try to run the test if Brotli is really supported on the platform (which is not the case on m1)

Modifications:

Only run if brotli is supported

Result:

Testsuite pass on m1

codec-http/src/test/java/io/netty/handler/codec/http/HttpContentCompressorOptionsTest.java

@@ -16,9 +16,11 @@
 package io.netty.handler.codec.http;
 
 import io.netty.channel.embedded.EmbeddedChannel;
+import io.netty.handler.codec.compression.Brotli;
 import io.netty.handler.codec.compression.StandardCompressionOptions;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledIf;
 
 import static org.hamcrest.CoreMatchers.instanceOf;
 import static org.hamcrest.CoreMatchers.is;
@@ -28,8 +30,13 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+@EnabledIf("isBrotiAvailable")
 class HttpContentCompressorOptionsTest {
 
+    static boolean isBrotiAvailable() {
+        return Brotli.isAvailable();
+    }
+
     @Test
     void testGetBrTargetContentEncoding() {
         HttpContentCompressor compressor = new HttpContentCompressor(