Add support for sycl accessors

This MR extends the sycl support:

• Adding function so that sycl::accessors can be used in the map_field function
• Changes the API of the cgh.parrallel_for to work like the API of sfg.function

added 9 commits

• d862626f...a47eeeeb - 2 commits from branch pycodegen:master
• 218c3334 - First draft to add support for sycl accessors:
• 188308e1 - formatting
• 26dc9e70 - reworked the api for parallel_for to look like the sfg.function api
• 764f56e4 - All dimensions of a field are now mapped to the accessor dimension, this
• 77316bdf - added a test for the parallel_for
• 6b82a4e9 - Merge branch 'sycl_accessor' of i10git.cs.fau.de:ob28imeq/pystencils-sfg into sycl_accessor
• 0ee586ef - updated the integration test to new config api

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requested review from @da15siwa

added 2 commits

• f8ed8ad8 - Added a generator script to test the sycl accessors
• f02641fe - using get_dtype() to get the full typename

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resolved all threads

approved this merge request

merged

mentioned in commit 660f5c6d

mentioned in issue pystencils#126