Deployment Env Vars passed in as a list aren't joined with Env Vars set on a work-pool

[masonmenges]

Bug summary

Environment Variables set on a Kubernetes work-pool that are passed in as a list are not joined with env variables that are set as job variables on a deployment instead only the environment variables set on the deployment are referenced, they are merged when passing in a dictionary of Variables, This primarily comes up when trying to reference Secret Values as env variables in Kubernetes as this requires passing in the variables as a list for it to be supported.

Workpool Environment variables:

[{"name":"SUPER_SECRET","valueFrom":{"secretKeyRef":{"key":"super-secret","name":"some-new-secret-test"}}},{"name":"some workpool variable","value":"SUPER WORKPOOL VARIABLE"}]

Deployment Environment Variables:

[{"name": "env_var_job_var_new", "value": "job_var1"}]

Environment Variables from the pod:

        - name: PREFECT_DEBUG_MODE
          value: 'False'
        - name: PREFECT_API_URL
          value: 
        - name: PREFECT_API_KEY
          value: 
        - name: PREFECT_API_ENABLE_HTTP2
          value: 'True'
        - name: PREFECT_LOGGING_LEVEL
          value: DEBUG
        - name: PREFECT_SERVER_EPHEMERAL_ENABLED
          value: 'True'
        - name: PREFECT_WORKER_QUERY_SECONDS
          value: '5.0'
        - name: PREFECT_WORKER_PREFETCH_SECONDS
          value: '10.0'
        - name: PREFECT__FLOW_RUN_ID
          value: 324db939-06c6-45be-9b86-cdcd4919fe2c
        - name: env_var_job_var_new
          value: job_var1

Version info

Version:             3.2.11
API version:         0.8.4
Python version:      3.12.4
Git commit:          9481694f
Built:               Wed, Mar 5, 2025 10:00 PM
OS/Arch:             darwin/arm64
Profile:             masonsandbox
Server type:         cloud
Pydantic version:    2.10.6
Integrations:
  prefect-dask:      0.3.2
  prefect-snowflake: 0.28.0
  prefect-slack:     0.3.0
  prefect-gcp:       0.6.2
  prefect-aws:       0.5.0
  prefect-gitlab:    0.3.1
  prefect-dbt:       0.6.4
  prefect-kubernetes: 0.5.8
  prefect-docker:    0.6.1
  prefect-sqlalchemy: 0.5.1
  prefect-shell:     0.3.1

Additional context

No response