[SYSTEMDS-3891] Add OOC Reshape Primitive

[jessicapriebe]

This adds an OOC reshape primitive that reshapes matrices out-of-core by splitting input blocks into slices and storing them in the cache-owned state table. Output blocks are rebuilt individually or as block rows/columns, depending on the reshape dimensions, and are enqueued as soon as they are completed.

[codecov]

Codecov Report

❌ Patch coverage is 87.36842% with 60 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.13%. Comparing base (4ebbdae) to head (d8da0e9).
⚠️ Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
...ds/runtime/ooc/primitives/ReshapeOOCPrimitive.java	87.17%	37 Missing and 23 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2619      +/-   ##
============================================
+ Coverage     71.41%   72.13%   +0.71%     
- Complexity    50721    51130     +409     
============================================
  Files          1642     2097     +455     
  Lines        197165   226729   +29564     
  Branches      38306    38627     +321     
============================================
+ Hits         140815   163556   +22741     
- Misses        45279    51992    +6713     
- Partials      11071    11181     +110     

Flag	Coverage Δ
java	71.49% <87.36%> (+0.07%)	⬆️
python	76.68% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[Baunsgaard]

Just because i was curious on the OOC operator i took a look. However, it was not super decipherable from the PR for me, so I thought I would leave some hints to clean it up and make it readable.

All just suggestions.

[janniklinde]

Thanks for the patch @jessicapriebe! I reviewed the PR and found some issues related to asynchronous execution and error propagation. I opened a PR to (hopefully) address those issues. Since your PR is fairly complex, I leave those proposed changes for you to review :)

Generally, there is some duplicate code for row/col specific handling. Not sure if this can somehow be simplified but just as a side note. Also, indexing is still hard to understand but I'm honestly not sure how to fix this. Maybe by wrapping those computations into more descriptive functions with a block comment?

[jessicapriebe]

Thanks for the feedback @janniklinde! I included your proposed changes with some minor adjustments. I also cleaned up the indexing and added comments for the more complex parts, while keeping the row/column-specific handling mostly separate for readability.

[janniklinde]

Thanks for the update @jessicapriebe. I left three more comments where I still have correctness concerns (which I missed before)