Alert: added box shadow

[akashyeole]

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Description Added the box shadow the alert component as per the figma design.

Related Issue

1330

📦 Published PR as canary version: 22.1.0--canary.1332.e60479bac310ccdd4178c01b2061c0a16fe903fc.0

:sparkles: Test out this PR locally via: ```bash npm install @infineon/infineon-design-system-stencil@22.1.0--canary.1332.e60479bac310ccdd4178c01b2061c0a16fe903fc.0 # or yarn add @infineon/infineon-design-system-stencil@22.1.0--canary.1332.e60479bac310ccdd4178c01b2061c0a16fe903fc.0 ```

[github-actions[bot]]

PR Preview Action v1.4.7 :---: Preview removed because the pull request was closed. 2024-07-01 07:33 UTC

[github-actions[bot]]

--STORYBOOK-PREVIEW--

• PR Preview URL for Storybook: https://Infineon.github.io/infineon-design-system-stencil/pr-preview/pr-1332/

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--EXAMPLE-APPS-PREVIEW-- PR Preview URLs:

• Vue example: https://Infineon.github.io/infineon-design-system-stencil/pr-preview-vue-example/pr-1332/
• React example: https://Infineon.github.io/infineon-design-system-stencil/pr-preview-react-example/pr-1332/
• Angular example: https://Infineon.github.io/infineon-design-system-stencil/pr-preview-angular-example/pr-1332/
• Vanilla example: https://Infineon.github.io/infineon-design-system-stencil/pr-preview-vanilla-example/pr-1332/

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:rocket: PR was released in v22.1.0 :rocket: