Add .command.log redirection in K8s container command when Fusion is not enabled

[jorgee]

When using k8s without Fusion the .command.log file is only saved if a task fails. However, Platform tries to get .command.log for all tasks executed. So for non-failed tasks it is unable to find the log file.

This PR changes the container command to include the redirection of .command.run outputs to .command.log when Fusion is not enabled. It replaces #6451 because getting .command.log from the pod logs for all tasks overload the Kubernetes API with large number of tasks.

See also #2782

Tested with local K3d cluster:

$ nextflow kuberun -head-image jorgeejarquea/nextflow:25.08.0-edge-2765d4a69 hello -v nextflow-pvc:/mnt/data/launch
Pod started: focused-noyce
N E X T F L O W  ~  version 25.08.0-edge
Pulling nextflow-io/hello ...
 downloaded from https://github.com/nextflow-io/hello.git
Launching `https://github.com/nextflow-io/hello` [focused-noyce] DSL2 - revision: 2ce0b0e294 [master]
[33/9aad8c] Submitted process > sayHello (2)
[31/17e511] Submitted process > sayHello (3)
[23/a4f15c] Submitted process > sayHello (1)
[4a/9738de] Submitted process > sayHello (4)
Ciao world!

Hello world!

Bonjour world!

Hola world!


/tmp/k3d-storage/jorgee/work/33/9aad8c9e9711ce00bd30f7a383f3ce$ ls -lart
total 28
drwxr-xr-x 3 root root 4096 oct  7 15:45 ..
-rw-r--r-- 1 root root 3163 oct  7 15:45 .command.run
-rw-r--r-- 1 root root   35 oct  7 15:45 .command.sh
-rw-r--r-- 1 root root    0 oct  7 15:46 .command.begin
-rw-r--r-- 1 root root    0 oct  7 15:46 .command.err
-rw-r--r-- 1 root root   12 oct  7 15:46 .command.out
-rw-r--r-- 1 root root   12 oct  7 15:46 .command.log
-rw-r--r-- 1 root root    1 oct  7 15:46 .exitcode
drwxr-xr-x 2 root root 4096 oct  7 15:46 .

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[pditommaso]

It would better still trying to fetch the logs via the API in case of failure

[jorgee]

I have reverted the savePodLogsOnError part.