Ensure docker images for current architecture are built for testing (#69554)

Author: mark-vieira

distribution/docker/build.gradle

@@ -244,7 +244,7 @@ elasticsearch_distributions {
 }
 
 tasks.named("preProcessFixture").configure {
-  dependsOn elasticsearch_distributions.docker_default, elasticsearch_distributions.docker_oss
+  dependsOn elasticsearch_distributions.matching { it.architecture == Architecture.current() }
   dependsOn "copyNodeKeyMaterial"
   doLast {
     // tests expect to have an empty repo

gradle/build-scan.gradle

@@ -1,3 +1,4 @@
+import org.elasticsearch.gradle.Architecture
 import org.elasticsearch.gradle.OS
 import org.elasticsearch.gradle.info.BuildParams
 import org.gradle.initialization.BuildRequestMetaData
@@ -14,6 +15,7 @@ buildScan {
   String nodeName = System.getenv('NODE_NAME')
 
   tag OS.current().name()
+  tag Architecture.current().name()
 
   // Tag if this build is run in FIPS mode
   if (BuildParams.inFipsJvm) {