fix(appbuilder): Issue related to App-builder placeholder wrong message

[jonife]

Problem

I was working on a CDK project, and after synthesizing my CDK template, I noticed that the app-builder is showing a misleading notification to customers: No IaC templates found in the workspace. This seems incorrect, as I do have IaC templates in the workspace, including both raw and synthesized CDK templates.

While I understand the intention behind the message, it needs to be more precise to avoid confusion. I suggest we roll it back to something more accurate, like No SAM templates found in the workspace, to clearly indicate the specific missing template type. I'm considering this a P0 issue and will raise a PR to address it.

Solution

Solution is to change all instance where IAC is mentioned to the customer to SAM, we would roll back to IaC once we start support CDK.

Remove redundant Logic.

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License: I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

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[justinmk3]

I improved the changelog. Please review https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#changelog for future PRs.