[Flang] Move builtin .mod generation into runtimes

[Meinersbur]

llvm#169638 pre-merged into amd-staging

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PSDB Link: https://compiler-ci.amd.com/job/compiler-psdb-amd-staging/2964

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PSDB Link: https://compiler-ci.amd.com/job/compiler-psdb-amd-staging/2965

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PSDB Link: https://compiler-ci.amd.com/job/compiler-psdb-amd-staging/3049

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PSDB Link: https://compiler-ci.amd.com/job/compiler-psdb-amd-staging/3195

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PSDB Link: https://compiler-ci.amd.com/job/compiler-psdb-amd-staging/3198

[Meinersbur]

@ronlieb Merged-in llvm@7675fc7. This includes all the patches since the last merge. Had to resolve two merge conflicts unrelated to the PR:

• llvm/lib/Transforms/Vectorize/LoopVectorize.cpp: upstream inlined method
• llvm/runtimes/CMakeLists.txt: ROCm 6.3 handling seems to be gone

The test 'flang/test/Integration/amdgpu/debug-target-var.f90' is failing. I think it is unrelated to llvm#169638

These were automatically resolved by kdiff3:

• flang/test/Lower/OpenMP/target-enter-data-default-openmp52.f90
• llvm/test/Transforms/LoopVectorize/AArch64/predicated-costs.ll

Had to add
74f496e

For aomp to build the amgdcn-amd-amdhsa modules, ROCm/aomp#1737 needs to be applied.

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PSDB Link: https://compiler-ci.amd.com/job/compiler-psdb-amd-staging/3199

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PSDB Link: https://compiler-ci.amd.com/job/compiler-psdb-amd-staging/3201

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PSDB Link: https://compiler-ci.amd.com/job/compiler-psdb-amd-staging/3216