This consolidates the contents of #13, #14 and #17 into one PR

[dk949]

Commits from those PRs were cherry-picked on top of main

Warning

The changes in this PR work with xDSL v0.54.4, last release before xdsl 873c48a9afe2b0ce6e8413d29f8c1456288f3fc7, which moves to LLVM21.

#13 Make apply-target extensible with new targets

It should now be possible to inherit from ApplyTargetConfig and
override the _get_config member function to return a new config.

#14 Fix the else condition for sending implicitly mapped data

If the data is already present on the device, instead of sending it again, just return an element count of 2^64. When waiting for data, check if element count is 2^64 and if so, don't wait.

#17 Replaced uses of -1 as the dynamic index marker

xDSL now uses a different value for the dynamic index marker - builtin.DYNAMIC_INDEX with value -(2**63), which matches the value MLIR uses for this.

Now memrefs, and tensors that use -1 as the dynamic index get printed with a literal -1, rather than ?.

Closes #16

Additional changes

Replaced the use of LLVMPointerType.opaque() with LLVMPointerType() as typed llvm pointers have been removed from xDSL

Set xDSL version in pyproject.toml to latest supported.

Correctness test results

-------------------------------
Building dependencies
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Built assertion

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Building tests
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Built source file '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/do_loops.F90'
Built source file '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/procedures.F90'
Built source file '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/conditionals.F90'
Built source file '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/while_loops.F90'
Built source file '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/array_ops.F90'
Built source file '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/arrays.F90'
Built source file '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/allocatables.F90'
Built source file '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/intrinsics.F90'
Built source file '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/pointers.F90'

-------------------------------
Running tests
-------------------------------
[PASS] '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/allocatables.F90' Passes: 1041
[PASS] '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/do_loops.F90' Passes: 8
[PASS] '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/conditionals.F90' Passes: 3
[PASS] '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/procedures.F90' Passes: 12
[PASS] '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/intrinsics.F90' Passes: 389
[PASS] '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/arrays.F90' Passes: 839
[PASS] '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/array_ops.F90' Passes: 640
[PASS] '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/while_loops.F90' Passes: 6
[PASS] '/home/davidk/Uni/code/xdsl/ftn/examples/fragments/pointers.F90' Passes: 787

-------------------------------
Cleaning up successful tests
-------------------------------
Done

===============================
All tests passed
===============================

Filecheck results

-- Testing: 25 tests, 16 workers --
PASS: xftn :: omp/offload/ex6.test (1 of 25)
PASS: xftn :: omp/offload/ex8.test (2 of 25)
PASS: xftn :: omp/offload/ex3.test (3 of 25)
PASS: xftn :: omp/offload/ex2.test (4 of 25)
PASS: xftn :: omp/offload/ex5.test (5 of 25)
PASS: xftn :: omp/offload/ex4.test (6 of 25)
PASS: xftn :: omp/offload/ex1.test (7 of 25)
PASS: xftn :: omp/offload/ex7.test (8 of 25)
PASS: xftn :: fragments/procedures.test (9 of 25)
PASS: xftn :: solvers/jacobi.test (10 of 25)
PASS: xftn :: fragments/array_ops.test (11 of 25)
PASS: xftn :: fragments/arrays.test (12 of 25)
PASS: xftn :: omp/ex3.test (13 of 25)
PASS: xftn :: util/assertion.test (14 of 25)
PASS: xftn :: omp/ex2.test (15 of 25)
PASS: xftn :: fragments/conditionals.test (16 of 25)
PASS: xftn :: omp/ex1.test (17 of 25)
PASS: xftn :: solvers/gauss_seidel_stack.test (18 of 25)
PASS: xftn :: fragments/allocatables.test (19 of 25)
PASS: xftn :: fragments/do_loops.test (20 of 25)
PASS: xftn :: fragments/while_loops.test (21 of 25)
PASS: xftn :: solvers/gauss_seidel_heap.test (22 of 25)
PASS: xftn :: advection/pwadvection.test (23 of 25)
PASS: xftn :: fragments/pointers.test (24 of 25)
PASS: xftn :: advection/tra_adv.test (25 of 25)

Testing Time: 5.89s

Total Discovered Tests: 25
  Passed: 25 (100.00%)