[BUG] dictupdate.update silently drops values when merging a list w/ mapping

[tomdoherty]

Description
dictupdate.update silently drops values when merging a list with a mapping

Setup
(Please provide relevant configs and/or SLS files (be sure to remove sensitive info. There is no general set-up of Salt.)

Please be as specific as possible and give set-up details.

• 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
(Include debug logs if possible and relevant)

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Versions Report

salt --versions-report

(Provided by running salt --versions-report. Please also mention any differences in master/minion versions.)

Salt Version:
               Salt: 3007.1+38.g9dc6ca50a7
 
Python Version:
             Python: 3.11.11 (main, Dec  9 2024, 10:10:57) [GCC 13.3.0]
 
Dependency Versions:
               cffi: 1.17.1
           cherrypy: 18.10.0
           dateutil: 2.9.0.post0
          docker-py: 6.1.3
              gitdb: Not Installed
          gitpython: Not Installed
             Jinja2: 3.1.4
            libgit2: Not Installed
       looseversion: 1.3.0
           M2Crypto: 0.39.0
               Mako: Not Installed
            msgpack: 1.1.0
       msgpack-pure: Not Installed
       mysql-python: Not Installed
          packaging: 24.2
          pycparser: 2.22
           pycrypto: Not Installed
       pycryptodome: 3.21.0
             pygit2: Not Installed
       python-gnupg: 0.4.9
             PyYAML: 6.0.2
              PyZMQ: 26.2.0
             relenv: Not Installed
              smmap: Not Installed
            timelib: 0.3.0
            Tornado: 6.4.2
                ZMQ: 4.3.5
 
Salt Extensions:
 saltext.prometheus: 2.1.0
 
Salt Package Information:
       Package Type: Not Installed
 
System Versions:
               dist: debian 11.7 bullseye
             locale: utf-8
            machine: x86_64
            release: 6.1.84
             system: Linux
            version: Debian GNU/Linux 11.7 bullseye

Additional context
Add any other context about the problem here.