[DevSetting] Add install_proxy_url which will allow ParallelCluster to set Proxy environment for Build Image installation

[himani2411]

Description of changes

Add install_proxy_url which will allow ParallelCluster to set Proxy environment for Build Image installation

• Adding a recipe to setup proxy env as part of cookbook for testing Build Image in a restrictive environment [Integ] Add integration test for Pcluster Build Image in proxied environment  aws-parallelcluster#7324
• Add s3 global endpoint to overcome cfn_bootstrap script installation
• Add s3 enpoint for no proxy list so it goes to VPC endpoint
• addding old style s3 naming convention bucket-name.s3-eu-west-1.amazonaws.com to handle S3 redirecting (307 Temporary Redirect) when we use non-us-east-1 region
• Add cdn for amazonlinux in no_proxy list to re-direct to VPC endpoint

Tests

• ONGOING in [Integ] Add integration test for Pcluster Build Image in proxied environment  aws-parallelcluster#7324

References

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