Add Google Batch warning when for conflicting disk image config (#5279) [ci fast]

When both boot disk image and instance template are specified, the
instance template gets priority, as with many other options covered by
instance templates. Warn the user in this case.

This was missed in #5268.

Signed-off-by: Siddhartha Bagaria <1929612+siddharthab@users.noreply.github.com>

Author: siddharthab

docs/google.md

@@ -156,7 +156,7 @@ process myTask {
 
 :::{note}
 Using an instance template will overwrite the `accelerator` and `disk` directives, as well as the following Google Batch
-config options: `cpuPlatform`, `preemptible`, and `spot`.
+config options: `bootDiskImage`, `cpuPlatform`, `preemptible`, and `spot`.
 :::
 
 To use an instance template with GPUs, you must also set the `google.batch.installGpuDrivers` config option to `true`.

plugins/nf-google/src/main/nextflow/cloud/google/batch/GoogleBatchTaskHandler.groovy

@@ -303,6 +303,9 @@ class GoogleBatchTaskHandler extends TaskHandler implements FusionAwareTask {
             if( task.config.getDisk() )
                 log.warn1 'Process directive `disk` ignored because an instance template was specified'
 
+            if( executor.config.getBootDiskImage() )
+                log.warn1 'Config option `google.batch.bootDiskImage` ignored because an instance template was specified'
+
             if( executor.config.cpuPlatform )
                 log.warn1 'Config option `google.batch.cpuPlatform` ignored because an instance template was specified'