Remove deprecated `dpctl.tensor` submodule #6144

Job	Run time
build_linux (3.12)	5m 26s
build_linux (3.11)	5m 57s
build_windows (3.12)	10m 57s
build_windows (3.13)	11m 1s
build_linux (3.13)	6m 33s
build_linux (3.14)	5m 32s
build_windows (3.10)	10m 37s
build_windows (3.14)	10m 35s
build_linux (3.10)	6m 38s
build_windows (3.11)	10m 19s
test_examples_linux (3.11, false, ubuntu-22.04)	8m 57s
test_linux (3.12, false, ubuntu-22.04)	6m 30s
test_linux (3.14, false, ubuntu-22.04)	3m 53s
test_linux (3.11, false, ubuntu-22.04)	3m 47s
test_linux (3.10, false, ubuntu-22.04)	3m 43s
test_linux (3.13, false, ubuntu-22.04)	4m 9s
test_windows (3.10, false, windows-latest)	5m 4s
test_windows (3.12, false, windows-latest)	4m 10s
test_windows (3.13, false, windows-latest)	4m 21s
test_windows (3.11, false, windows-latest)	5m 5s
test_windows (3.14, false, windows-latest)	4m 25s
upload_linux	0s
upload_windows	-1s
Clean up anaconda packages	0s
	2h 17m 38s

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