chore(ecs/dependencies): make spring-boot-starter-test a testImplemem…

…tation dependency (#6207)

since it's not used in actual shipping code.  This reduces the size of the image and
reduces exposure to CVEs
(e.g. GHSA-chfm-68vv-pvw5).

clouddriver-ecs/clouddriver-ecs.gradle

@@ -41,14 +41,14 @@ dependencies {
  implementation "org.apache.httpcomponents:httpclient"
  implementation "org.apache.httpcomponents:httpcore"
  implementation "org.codehaus.groovy:groovy"
- implementation "org.springframework.boot:spring-boot-starter-test"
  implementation "org.springframework.boot:spring-boot-starter-web"
 
  testImplementation "cglib:cglib-nodep"
  testImplementation "org.mockito:mockito-core"
  testImplementation "org.objenesis:objenesis"
  testImplementation "org.spockframework:spock-core"
  testImplementation "org.spockframework:spock-spring"
+ testImplementation "org.springframework.boot:spring-boot-starter-test"
 
  integrationImplementation project(":clouddriver-web")
  integrationImplementation "org.springframework:spring-test"