Deploy manifest performs SpEL substitution even if Skip SpEL Evaluation is checked

Issue

A pipeline can be created that ingests a manifest and deploys it using the Deploy (Manifest) stage. As a part of the process, the manifest has some dynamic pieces that will need to be evaluated at runtime, with the syntax ${variable}. However, even with having checked the Skip SpEL evaluation option, the variables still end up getting evaluated and replaced before being sent to Kubernetes. Using a known workaround to escape the evaluator with syntax like ${"${variable}"} yields the same results - the variable is still evaluated.

Cause

This is a known issue, raised in:https://github.com/spinnaker/spinnaker/issues/5910...with target release of OSS 1.27 (mapping to Armory 2.27.2) If SpEL expressions are instead evaluated for lines that have been commented out, see Spinnaker Improperly Errors Even When SPEL Expressions Are Commented Out.