Add support for /d20bforceinline

[MatthewJM96]

Summary

• Add support for an MSVC optimisation flag, /d20bforceinline, which causes __forceinline to be respected in debug builds.

Scope

One change in src/compiler/msvc.rs to add a pass through for the flag, same as /d1nodatetime.

Validation

Updated pass through test to include the new flag.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 38.08%. Comparing base (7cd4f2c) to head (7297d3b).

❗ There is a different number of reports uploaded between BASE (7cd4f2c) and HEAD (7297d3b). Click for more details.

HEAD has 11 uploads less than BASE

Flag	BASE (7cd4f2c)	HEAD (7297d3b)
	13	2

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2781       +/-   ##
===========================================
- Coverage   70.90%   38.08%   -32.83%     
===========================================
  Files          71       56       -15     
  Lines       40393    15848    -24545     
===========================================
- Hits        28642     6035    -22607     
+ Misses      11751     9813     -1938     

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[AJIOB]

Typo in flag name, so the CI was failed