Add reindexFromSnapshotWorkerSize to cdk with default and maximum modes

[AndreKurait]

Description

Added an RFS High Performance Mode that does the following:

• Increases EBS Throughput for faster s3 download and extract
• Increases worker size to 16vCPU 32GB
• Sets max concurrent requests to 100
• Enables Target Compression

With these settings, i was able to use 5 workers to migrate a 5 shard source where each source shard was 1.9TiB (9.2TiB total) in 7 hours with a target cluster composed of 10 r7gd.16xlarge data nodes (Increased target index shard count to 400).

Also improved the UX by adding a buffer on max shard size which can reduce friction when shards are slightly uneven and a customer calculated their max shard size by taking primary size / shards.

Also fixed a bug in imageHash for builds with "docker-compatible" clients like podman when image Id just returns the hash and not a :.

• Category: New Feature
• Why these changes are required? Enable vertical scaling when horizontal scaling is limited
• What is the old behavior before changes and new behavior after changes? Vertical scaling not supported, now supported

Issues Resolved

MIGRATIONS-2144

Is this a backport? If so, please add backport PR # and/or commits #

Testing

Testing: With these settings, i was able to use 5 workers to migrate a 5 shard source where each source shard was 1.9TiB (9.2TiB total) in 7 hours with a target cluster composed of 10 r7gd.16xlarge data nodes (Increased target index shard count to 400).

Added unit testing

Check List

• New functionality includes testing
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.66%. Comparing base (e2c5be7) to head (aab31a7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
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  Coverage     80.66%   80.66%           
  Complexity     2893     2893           
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  Files           383      383           
  Lines         14361    14361           
  Branches        989      989           
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  Hits          11584    11584           
  Misses         2184     2184           
  Partials        593      593           

Flag	Coverage Δ
gradle-test	78.75% <ø> (ø)
python-test	90.33% <ø> (ø)

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