packaging: update spread installation for autopkgtests to use github.com/canonical/spread

[ernestl]

Spread module name was changed in go.mod which breaks go based install of spread for autopkgtests: canonical/spread#281

122s 2026-03-24T05:45:21Z INFO Waiting for automatic snapd restart...
138s + export GOPATH=/tmp/go
138s + /snap/bin/go install github.com/snapcore/spread/cmd/spread@latest
138s go 1.26.1 from Canonical** installed
139s go: downloading github.com/snapcore/spread v0.0.0-20260323164801-a3a44a96b6d0
140s go: github.com/snapcore/spread/cmd/spread@latest: version constraints conflict:
140s 	github.com/snapcore/[email protected]: parsing go.mod:
140s 	module declares its path as: github.com/canonical/spread
140s 	        but was required as: github.com/snapcore/spread
140s autopkgtest [05:45:40]: test integrationtests: -----------------------]
140s autopkgtest [05:45:40]: test integrationtests:  - - - - - - - - - - results - - - - - - - - - -
140s integrationtests     FAIL non-zero exit status 1
141s autopkgtest [05:45:41]: @@@@@@@@@@@@@@@@@@@@ summary
141s integrationtests     FAIL non-zero exit status 1

This is a quick fix, to allow me to complete deb only release 2.74.1.
Adapt tests to use new module name.

Longer term we want to transition to using spread-plus. This work will follow soon:

• many: renamed module to github.com/canonical/spread-plus to fix go install for spread-plus spread-plus#81
• many: transition to using spread-plus #16813

[bboozzoo]

LGTM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.55%. Comparing base (1ef8229) to head (3670399).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #16812      +/-   ##
==========================================
- Coverage   77.63%   77.55%   -0.08%     
==========================================
  Files        1363     1364       +1     
  Lines      189126   188546     -580     
  Branches     2446     2446              
==========================================
- Hits       146827   146236     -591     
- Misses      33470    33478       +8     
- Partials     8829     8832       +3     

Flag	Coverage Δ
unittests	77.55% <ø> (-0.08%)	⬇️

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[github-actions]

Tue Mar 24 09:00:35 UTC 2026

Spread tests skipped