Rehan Sohail Durrani

FEAT-#3535: Implement partition shuffling mechanism and algebra sort_by

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## What do these changes do? - [x] commit message follows format outlined [here](https://modin.readthedocs.io/en/latest/development/contributing.html#commit-message-formatting) - [] passes `flake8 modin/ asv_bench/benchmarks scripts/doc_checker.py` - [ ] passes `black --check modin/ asv_bench/benchmarks scripts/doc_checker.py`...

REFACTOR: Refactor `full_axis` argument

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Rewrite Pandas version mismatch UserWarning

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FIX-#3764: Ensure df.loc with a scalar out of bounds appends to df

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In pandas, `df.loc[df.index + 1] = df.loc[index]` copies the last row and increases the `df`'s len by 1. When doing the same operation in Modin, we get an error since...

Jenkins Test Script for GPU

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Write testing script for Jenkins to run GPU unittests.

DOCS: Better documentation for ASV benchmarks

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### System information - **OS Platform and Distribution (e.g., Linux Ubuntu 16.04)**: - **Modin version** (`modin.__version__`): - **Python version**: - **Code we can use to reproduce**: ### Describe the problem...

Add implementations for DataFrame Algebra.

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FEAT-#4574: Warn users when pre-initialized Ray cluster is not using all available memory

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Signed-off-by: Rehan Durrani ## What do these changes do? - [x] commit message follows format outlined [here](https://modin.readthedocs.io/en/latest/development/contributing.html#commit-message-formatting) - [x] passes `flake8 modin/ asv_bench/benchmarks scripts/doc_checker.py` - [x] passes `black --check modin/...

Add arc + arg numpy APIs

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