[BUG] cp.list_master does not properly respect prefix

[nf-brentsaner]

Description
Given a SaltFS tree that looks like this (assuming e.g. /demo/...):

demo/
├── a
│   ├── b
│   │   ├── c
│   │   │   ├── targetfile1
│   │   │   └── targetfile2
│   │   ├── c_file
│   │   └── c_file2
│   └── b_file
└── a_file

4 directories, 6 files

Calling cp.list_master with prefix=demo/a/b/c OR with prefix=demo/a/b/c/ always results in the following:

demo/a/b/c_file2
demo/a/b/c_file
demo/a/b/c/targetfile2
demo/a/b/c/targetfile1

instead of at least one of the above (preferably for the fix, the one with the trailing slash -- which I presume is being trimmed off before evaluation/comparison) returning the following:

demo/a/b/c/targetfile2
demo/a/b/c/targetfile1

Setup
See above.

• on-prem machine
• VM (Virtualbox, KVM, etc. please specify)
• VM running on a cloud service, please be explicit and add details
• container (Kubernetes, Docker, containerd, etc. please specify)
• or a combination, please be explicit
• jails if it is FreeBSD
• classic packaging
• onedir packaging
• used bootstrap to install

Steps to Reproduce the behavior
See above. This behavior occurs both when invoked in a template (e.g. {% filelist = salt['cp.list_master'](prefix='<...>') %}) and when invoked directly (e.g. salt 'minion*' cp.list_master prefix='<...>').

Expected behavior
See above; a prefix especially with a trailing slash should match only children of that path, not children and siblings as if the slash was not specified.

Screenshots
N/A; see above.

Versions Report

salt --versions-report

master:

Salt Version:
          Salt: 3007.1
 
Python Version:
        Python: 3.10.14 (main, Apr  3 2024, 21:30:09) [GCC 11.2.0]
 
Dependency Versions:
          cffi: 1.16.0
      cherrypy: unknown
      dateutil: 2.8.2
     docker-py: Not Installed
         gitdb: Not Installed
     gitpython: Not Installed
        Jinja2: 3.1.4
       libgit2: 1.8.1
  looseversion: 1.3.0
      M2Crypto: Not Installed
          Mako: Not Installed
       msgpack: 1.0.7
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     packaging: 23.1
     pycparser: 2.21
      pycrypto: Not Installed
  pycryptodome: 3.19.1
        pygit2: 1.15.0
  python-gnupg: 0.5.2
        PyYAML: 6.0.1
         PyZMQ: 25.1.2
        relenv: 0.16.0
         smmap: Not Installed
       timelib: 0.3.0
       Tornado: 6.3.3
           ZMQ: 4.3.4
 
Salt Package Information:
  Package Type: onedir
 
System Versions:
          dist: almalinux 9.5 Teal Serval
        locale: utf-8
       machine: x86_64
       release: 5.14.0-503.26.1.el9_5.x86_64
        system: Linux
       version: AlmaLinux 9.5 Teal Serval

minion:

Salt Version:
          Salt: 3007.1
 
Python Version:
        Python: 3.10.14 (main, Apr  3 2024, 21:30:09) [GCC 11.2.0]
 
Dependency Versions:
          cffi: 1.16.0
      cherrypy: 18.8.0
      dateutil: 2.8.2
     docker-py: Not Installed
         gitdb: Not Installed
     gitpython: Not Installed
        Jinja2: 3.1.4
       libgit2: Not Installed
  looseversion: 1.3.0
      M2Crypto: Not Installed
          Mako: Not Installed
       msgpack: 1.0.7
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     packaging: 23.1
     pycparser: 2.21
      pycrypto: Not Installed
  pycryptodome: 3.19.1
        pygit2: Not Installed
  python-gnupg: 0.5.2
        PyYAML: 6.0.1
         PyZMQ: 25.1.2
        relenv: 0.16.0
         smmap: Not Installed
       timelib: 0.3.0
       Tornado: 6.3.3
           ZMQ: 4.3.4
 
Salt Package Information:
  Package Type: onedir
 
System Versions:
          dist: almalinux 9.5 Teal Serval
        locale: utf-8
       machine: x86_64
       release: 5.14.0-503.21.1.el9_5.x86_64
        system: Linux
       version: AlmaLinux 9.5 Teal Serval

Additional context
N/A