Rename scatter/gather to strided

Some instruction sets have separate strided and scatter/gather operations, e.g. RISC-V-V or NEC SX
15 jobs for sve in 45 minutes and 50 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test
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docker
arm64v8

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arm64v9

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build-documentation

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docker
flake8-lint

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AVX docker
latest-python

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cuda docker
minimal-conda

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cuda docker
minimal-sympy-master

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win
minimal-windows

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ppc64le

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AVX cuda11 docker manual
pycodegen-integration

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riscv64

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AVX cuda11 docker
tests-and-coverage

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87.41%
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AVX cuda11 docker
ubuntu

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arm64v9

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AVX docker
latest-python

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