Inline script not working for OS Families without chmod

[z3bra]

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Describe the bug
I am trying to automate some configuration on a Cisco switch (NXOS 9.3) by using an inline script, as configurations on these switches require multiple lines to apply the configuration. Example:

configure terminal
interface loopback 0
  ip address 127.0.0.2/32
exit

When using an "inline script" step targetting the switch (whose OS family is neither Unix nor Windows), the chmod +x $scriptfile command fails, preventing the job to proceed (even though the chmod bit is useless).
Bypassing this step is also not an alternative as the chmod is hardcoded in DefaultScriptFileNodeStepUtils.java.

My Rundeck detail

• Rundeck version: v5.1.1-20240305
• install type: rpm
• OS Name/version: RHEL8
• DB Type/version: postgres

To Reproduce
Steps to reproduce the behavior:

1. Add a non-posix node (eg. without the chmod command)
2. Create a job targetting this node
3. Add "inline script" step, and specify the interpreter explicitely (eg. run-script $scriptfile on NXOS)
4. Set "SCP" as the "Default File Copier" for the project
5. Run job

Expected behavior
The job should upload the script on the node and execute the script immediately using the given interpreter (which doesn't require the executable bit to run).
Instead, the job fails with the following error:

Syntax error while parsing 'chmod +x /scripts/1530-11418-nx-leaf7-stdn-dispatch-script.tmp.cmd'

Cmd exec error.
Failed: Unknown: Remote command failed with exit status 16