feat(vscode): Update Auth method

[ccastrotrejo]

This pull request primarily focuses on removing the use of ServiceClientCredentials and simplifying the authorization token retrieval process across various files. Additionally, it includes the addition of a new dependency in the package.json file.

This PR updates our auth method for the upcoming deprecation of the azure-account vscode extension as stated in microsoft/vscode-azure-account#964

• Removed the use of ServiceClientCredentials and simplified the getAuthorizationToken function call.
• Added @microsoft/vscode-azext-azureauth version 3.0.0 to the dependencies.
• Removed the Azure Account extension from the list of required Visual Studio Code extensions.

Screenshots

When logged out from Azure Resources vscode identifies we also use those crendentials

When user doesn't consent to login when trying to get acesstoken, user will see the following error