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.
Note that this breaks our snapshots for windows builds:

    2 │-target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
    3 │-target triple = "x86_64-pc-linux-gnu"
    2 │+target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
    3 │+target triple = "x86_64-pc-windows-msvc"

Omitting the triple does not fix this issue, since the datalayout is not identical for linux and windows either.

This commit changes ALL codegen snapshots, so the snapshot updates are separated into their own commits. It also removes the previously added special handling for struct debug types since we can now rely on the preferred alignment of LLVM.

[codecov]

Codecov Report

Attention: Patch coverage is 86.15385% with 9 lines in your changes missing coverage. Please review.

Project coverage is 94.10%. Comparing base (e731987) to head (a0d9db6).
Report is 67 commits behind head on master.

Files with missing lines	Patch %	Lines
compiler/plc_driver/src/pipelines.rs	73.52%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1472      +/-   ##
==========================================
+ Coverage   93.67%   94.10%   +0.43%     
==========================================
  Files         166      173       +7     
  Lines       50097    56590    +6493     
==========================================
+ Hits        46928    53256    +6328     
- Misses       3169     3334     +165     

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