FEAT-#7254: Support right merge/join #15588

Job	Run time
execution-filter	5s
lint (flake8)	17s
lint (mypy)	2m 28s
Test API, headers and no-engine mode	2m 11s
Test HDK storage format, Python 3.9	19m 36s
test-clean-install-ubuntu	2m 6s
test-clean-install-windows	2m 39s
test-asv-benchmarks	20s
test-ubuntu (engine python, python 3.9, group_1)	19m 30s
Test BaseOnPython execution, Python 3.9	15m 41s
test-windows (engine python, python 3.9, group_1)	35m 2s
test experimental	8m 9s
test-internals	7m 19s
test-ubuntu-sanity (engine ray, python 3.9)	17m 9s
test-spreadsheet (engine ray, python 3.9)	2m 19s
test-ubuntu-sanity (engine dask, python 3.9)	37m 30s
test-spreadsheet (engine dask, python 3.9)	2m 17s
test-ubuntu (engine unidist ${{ matrix.unidist-backend }}, python ${{ matrix.python-version }})	0s
test-ubuntu-sanity (engine unidist, python 3.9)	15m 21s
test-windows-sanity (engine ray, python 3.9)	25m 20s
test-windows-sanity (engine dask, python 3.9)	34m 23s
test-windows-sanity (engine unidist, python 3.9)	25m 53s
merge-coverage-artifacts	3s
upload-coverage	30s
	4h 36m 8s

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