[Jenkins] Always archive build artifacts.

This enables downloading of binaries on each Pull Request.

scripts/jenkins/gcc.groovy

@@ -33,10 +33,8 @@ image.inside(defaultDockerArgs) {
     }
 }
 
-if (helper.isRelease(this)) {
-    stage('Release (Linux-Docker)') {
-        archiveArtifacts 'build/*.tar.gz'
-    }
+stage('Archive (Linux-Docker)') {
+    archiveArtifacts 'build/*.tar.gz'
 }
 
 stage('Post (Linux-Docker)') {

scripts/jenkins/mac.groovy

@@ -31,10 +31,8 @@ stage('Data Explorer (Mac)') {
     build.linux this, 'build', null, 'ninja'
 }
 
-if (helper.isRelease(this)) {
-    stage('Release (Mac)') {
-        archiveArtifacts 'build/*.tar.gz,build/*.dmg'
-    }
+stage('Archive (Mac)') {
+    archiveArtifacts 'build/*.tar.gz,build/*.dmg'
 }
 
 stage('Post (Mac)') {

scripts/jenkins/msvc.groovy

@@ -41,10 +41,8 @@ withEnv(helper.getEnv(this)) {
     }
 }
 
-if (helper.isRelease(this)) {
-    stage('Release (Win)') {
-        archiveArtifacts 'build/*.zip'
-    }
+stage('Archive (Win)') {
+    archiveArtifacts 'build/*.zip'
 }
 
 stage('Post (Win)') {