feat: track go template sumfiles

[lkingland]

• 🧹 enable tracking of Go sumfiles in templates

In order for Scaffolding to correctly associate the dependencies of the "embedded" function, we actually do need to track the initial sumfiles for the source function template. This change should have no effect on "nonscaffolded" functions; and we probably should have been doing this anyway.

/kind cleanup

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.21 🎉

Comparison is base (506cb71) 62.84% compared to head (8dc3944) 63.06%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1688      +/-   ##
==========================================
+ Coverage   62.84%   63.06%   +0.21%     
==========================================
  Files          93       93              
  Lines       11967    11967              
==========================================
+ Hits         7521     7547      +26     
+ Misses       3757     3734      -23     
+ Partials      689      686       -3     

Flag	Coverage Δ
e2e-test	38.86% <ø> (ø)
e2e-test-oncluster	34.74% <ø> (+0.10%)	⬆️
e2e-test-oncluster-runtime	29.56% <ø> (?)
e2e-test-runtime-go	28.16% <ø> (?)
e2e-test-runtime-node	29.40% <ø> (?)
e2e-test-runtime-python	29.40% <ø> (?)
e2e-test-runtime-quarkus	29.53% <ø> (?)
e2e-test-runtime-springboot	28.42% <ø> (?)
e2e-test-runtime-typescript	29.53% <ø> (?)
integration-tests	50.07% <ø> (+0.07%)	⬆️
unit-tests-macos-latest	48.81% <ø> (-0.03%)	⬇️
unit-tests-ubuntu-latest	49.76% <ø> (+0.02%)	⬆️
unit-tests-windows-latest	48.89% <ø> (ø)

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see 2 files with indirect coverage changes

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[matejvasek]

/approve
/lgtm

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lkingland, matejvasek

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