solution account event updates, cfct template update

[andywick-aws]

Added

• Added customizations-for-aws-control-tower.template to align with the latest user guide instructions.

Changed

• Common CFCT Setup solution updates:
  • Replaced the S3 template link with the latest template from the GitHub repository.
• EC2 Default EBS Encryption solution updates:
  • Added account and organization event support.
  • Added SNS fanout for configuring accounts to replace multi-threading.
  • Added Lambda environment variables to replace SSM parameter for configuration.
• S3 Block Account Public Access solution updates:
  • Added account and organization event support.
  • Added SNS fanout for configuring accounts to replace multi-threading.
  • Added Lambda environment variables to replace SSM parameter for configuration.
• Security Hub Organization updates:
  • Added account and organization event support.
• Updated the staging script to include *.template files.

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Apache 2.0 License