Adds support for uninstalling IBM Cloud Pak for Data (CP4D) as part of the MAS uninstall pipeline.

[prajeshjain]

Changes

src/mas/devops/tekton.py

• Added three new parameters to launchUninstallPipeline():
  • uninstallCp4d: bool — flag to trigger CP4D uninstall
  • cpdOperatorsNamespace: str — namespace for CPD operators
  • cpdInstanceNamespace: str — namespace for CPD instance
• Added cp4dAction resolution logic (mirrors existing pattern for SLS/DRO/MongoDB)
• Passes cp4d_action, cpd_operators_namespace, and cpd_instance_namespace into the template renderer

src/mas/devops/templates/pipelinerun-uninstall.yml.j2

• Added conditional block for CP4D parameters — the block is only rendered when cp4d_action != "none"
• cpd_operators_namespace and cpd_instance_namespace are conditionally included only when non-empty, preventing empty params from being injected into the PipelineRun

Testing

• Verified template renders correctly when CP4D uninstall is enabled/disabled
• Verified optional namespace params are omitted when not provided