Remove deprecated `dpctl.tensor` submodule #6055

Job	Run time
build_windows (3.14)	10m 3s
build_windows (3.13)	10m 35s
build_windows (3.11)	10m 45s
build_linux (3.10)	5m 54s
build_linux (3.13)	6m 24s
build_windows (3.10)	12m 27s
build_linux (3.12)	6m 15s
build_linux (3.14)	5m 32s
build_windows (3.12)	10m 52s
build_linux (3.11)	6m 22s
test_linux (3.14, false, ubuntu-22.04)	3m 16s
test_examples_linux (3.11, false, ubuntu-22.04)	9m 1s
test_linux (3.10, false, ubuntu-22.04)	2m 56s
test_linux (3.11, false, ubuntu-22.04)	7m 26s
test_linux (3.12, false, ubuntu-22.04)	3m 2s
test_linux (3.13, false, ubuntu-22.04)	2m 54s
test_windows (3.11, false, windows-latest)	4m 24s
test_windows (3.10, false, windows-latest)	3m 57s
test_windows (3.14, false, windows-latest)	3m 57s
test_windows (3.12, false, windows-latest)	4m 7s
test_windows (3.13, false, windows-latest)	4m 14s
upload_linux	-1s
upload_windows	0s
Clean up anaconda packages	0s
	2h 14m 22s

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