[CI] Pass failFast flag to Jenkins parallel

This should cause the entire parallel branch to fail if an individual job fails - freeing up executors for other jobs rather than holding them for hours.

Author: Mousius

Jenkinsfile

@@ -201,7 +201,8 @@ def unpack_lib(name, libs) {
 }
 
 stage('Build') {
-  parallel 'BUILD: GPU': {
+  parallel failFast: true,
+  'BUILD: GPU': {
     node('GPUBUILD') {
       ws(per_exec_ws("tvm/build-gpu")) {
         init_git()
@@ -285,7 +286,8 @@ stage('Build') {
 }
 
 stage('Unit Test') {
-  parallel 'python3: GPU': {
+  parallel failFast: true,
+  'python3: GPU': {
     node('TensorCore') {
       ws(per_exec_ws("tvm/ut-python-gpu")) {
         init_git()
@@ -345,7 +347,8 @@ stage('Unit Test') {
 }
 
 stage('Integration Test') {
-  parallel 'topi: GPU': {
+  parallel failFast: true,
+  'topi: GPU': {
     node('GPU') {
       ws(per_exec_ws("tvm/topi-python-gpu")) {
         init_git()