Updated the Docker File, eks-aperf.sh and adding eks-aperf-README.md Adding support async-profiler on EKS

[jrishabh248]

Issue #, if available:
The aperf tool had issues in capturing the async profiler data for java based applications running on eks which was mentioned as limitation with the eks-aperf.sh script.

Description of changes:
Fix the above issue below modifications

• Replace pod specification with new aperf pod configuration
• Add direct variable substitution in heredoc instead of sed commands
• Implement kubectl exec-based profiling workflow for better reliability
• Fix kubectl cp command to use correct tar.gz filename from aperf report
• Remove manual tar creation as aperf report generates it automatically
• Add host path creation functionality for on-the-fly directory setup using temporary setup pod

Host path improvements:

• Create async profiler directory on target nodes automatically
• Mount host root filesystem to setup required directories
• Enable shared volume mounting between application and APerf pods
• Support for /opt/k8s/async-profiler/async-profiler-4.2-linux-arm64 host path
• Ensure proper directory permissions for profiler execution

Script improvements:

• Use predictable aperf record/report naming with timestamps
• Simplify aperf report command to use directory from record step
• Enhanced error handling for missing report directories
• Streamlined file copying process
• Enable --profile-java support through shared volume configuration

Documentation updates:

• Create comprehensive combined README merging existing and new documentation
• Add detailed application pod configuration requirements for shared volume mounting
• Include complete setup instructions from ECR repository creation to execution
• Document worker node requirements for async profiler binaries
• Add troubleshooting guide and security considerations
• Remove outdated limitation about --profile-java support
• Include real execution examples and expected output
• Document host path creation and shared volume requirements

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[CongkaiTan]

The title says "Updated the Docker File, eks-aperf.sh and adding eks-aperf-README.md", but seems the change only includes readme?

[salvatoredipietro]

A similar pull request was opened here: https://github.com/aws/aperf/pull/355/files