bootWar is configured eagerly

[wilkinsona]

While reviewing #30209, I noticed that bootWar is configured eagerly. This is due to querying the extension of its artifact:

spring-boot/spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/SinglePublishedArtifact.java

Line 42 in 43ba80d

if (this.currentArtifact == null || "war".equals(candidate.getExtension())) {

currentArtifact will be non-null as the artifact for bootJar (created when the Java plugin is applied) will have already been added.