Use Cargo Component Action

Replace the `run` steps in the workflow that build the wasm component with a GH action that outputs the .wasm file name to be used in future steps to avoid using `env.ComponentName`.

Locate the GitHub Actions workflow and inspect the run steps that build the wasm component. Read the Cargo Component Action documentation to identify its filename output, then verify that later workflow steps consume that output instead of env.ComponentName. Done means the workflow builds the component and passes the resulting .wasm filename to subsequent steps.

Written by the indexing model from the issue text.