ci: use production config for examples build

[chintankavathia]

also remove aot config from angular.json as it is now by default.

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Documentation.
Examples.
Dashboards Demo.
Playwright report.

Coverage Reports:

• element-ng
• element-translate-ng

[gemini-code-assist]

Code Review

This pull request removes the Ahead-of-Time (AOT) compilation configuration and its associated build script for the element-examples project. Specifically, the aot configuration block is removed from angular.json, and the build:examples:aot script is removed from package.json. No feedback is provided for this pull request.