Add support for AWS IAM list_server_certificates

[Saru2003]

Summary

Describe your changes.

Adds support for syncing AWS IAM Server Certificates into Cartography. Creates AWSServerCertificate nodes in Neo4j with properties like arn, name, path, upload_date, aws_account_id, and update_tag. Includes incremental sync support via update_tag and adds the function to RESOURCE_FUNCTIONS for AWS syncs.

Issue: Closes #1886

Related issues or links

Include links to relevant issues or other pages.

• https://github.com/cartography-cncf/cartography/issues/...

Checklist

Provide proof that this works (this makes reviews move faster). Please perform one or more of the following:

• [ ] Update/add unit or integration tests.
• [ ] Include a screenshot showing what the graph looked like before and after your changes.
• [ ] Include console log trace showing what happened before and after your changes.

If you are changing a node or relationship:

• [ ] Update the schema and readme.

If you are implementing a new intel module:

• [ ] Use the NodeSchema data model.

• [ ] Confirm that the linter actually passes (submitting a PR where the linter fails shows reviewers that you did not test your code and will delay your review).

[achantavy]

Hi @Saru2003 have you tested this? Please resolve the linter errors so we can review, thank you!