[Bug] Bug in gpinitsystem when creating multiple segments per segment host

### Cloudberry Database version

1.6.0

### What happened

See attached documents. We are creating a cluster on 12 segment hosts that is supposed to have 4 primaries per segment host spread across 4 mounted disks:

/data1
/data2
/data3
/data4

What resulted instead is we ended up with 2 primaries per segment host with it being fairly random as to what disks it created it on.

As a workaround I had to change the config file to double up the disk list. It just seems to be cutting it in half for some reason.

### What you think should happen instead

it should be creating the number of primary segments as per the number of data drives in the DATA_DIRECTORY list

### How to reproduce

See attached
[gpinit_bug_1.txt](https://github.com/user-attachments/files/16965590/gpinit_bug_1.txt)
[gpinit_bug_workaround.txt](https://github.com/user-attachments/files/16965592/gpinit_bug_workaround.txt)

### Operating System

rocky8

### Anything else

_No response_

### Are you willing to submit PR?

- [ ] Yes, I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://cloudberrydb.org/community/coc).