fix: add target datalayout and triple to IR

[mhasel]

Adds target data-layout and target triple to generated IR. This ensures consistent alignment for both generated code and debug information.

This commit changes ALL codegen snapshots. It also removes the previously added special handling for struct debug types since we can now rely on the preferred alignment of LLVM.

Codegen snapshots are now asserted via a wrapper macro over insta::assert_snapshot, in which settings for insta are adjusted to filter out the datalayout and target triple, since otherwise the CI would fail for windows.

[codecov]

Codecov Report

Attention: Patch coverage is 84.61538% with 14 lines in your changes missing coverage. Please review.

Project coverage is 94.11%. Comparing base (e731987) to head (d29607e).
Report is 117 commits behind head on master.

Files with missing lines	Patch %	Lines
compiler/plc_driver/src/pipelines.rs	66.66%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1472      +/-   ##
==========================================
+ Coverage   93.67%   94.11%   +0.44%     
==========================================
  Files         166      174       +8     
  Lines       50097    56771    +6674     
==========================================
+ Hits        46928    53430    +6502     
- Misses       3169     3341     +172     

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