feat: Add configuration option to disable scanning Go version from go.mod

[another-rex]

This commit addresses the issue where Go version warnings based on go.mod are misleading because the go directive specifies the minimum required language version, not the actual toolchain version. We introduce a new ScanGoModVersion configuration setting, which is disabled by default, ensuring we avoid assumptions regarding the toolchain version from go.mod files.

Snapshots and tests have been updated accordingly to reflect this change in the default behavior.

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PR created automatically by Jules for task 5355023063191685691 started by @another-rex

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[G-Rath]

Rather than introduce a new config property, what about reusing the existing one with a value of ignore or something?

We can use a custom marshaller to handle the type difference

[another-rex]

I think the issue is that I want it to be disabled by default, and opt in, which makes the override field a bit odd to use.

I guess we can have a term like "scan", but it's not really Overriding anything if the default is the version is not extracted.

[G-Rath]

Ah yeah fair, if it's disabled by default that makes more sense - we could have it kind of like the version properties in things like gh actions e.g.

GoVersion: 'go.mod'
GoVersion: '.go-version'

GoVersion: 1.20

But thats probably not ergonomic enough to be worth it especially since it's off by default now 🤷‍♂️

[codecov-commenter]

Codecov Report

❌ Patch coverage is 70.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.03%. Comparing base (fab07dd) to head (a42002f).

Files with missing lines	Patch %	Lines
pkg/osvscanner/osvscanner.go	70.00%	5 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2637      +/-   ##
==========================================
+ Coverage   68.01%   68.03%   +0.02%     
==========================================
  Files         173      173              
  Lines       13389    13406      +17     
==========================================
+ Hits         9106     9121      +15     
- Misses       3575     3579       +4     
+ Partials      708      706       -2     

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[another-rex]

@jules Rerun the snapshots building to resolve the conflict (make rebuild-all)

[google-labs-jules]

@jules Rerun the snapshots building to resolve the conflict (make rebuild-all)

I have rerun the snapshot building and updated the snapshots.