tests: fix nvidia-driver:535 on ubuntu 22.04 and 24.04

[sergiocazzolato]

I see apt-cache show nvidia-driver-535 now reports a transitional metapackage on 22.04 and 24.04.

The test expects every known transitional package to already be listed in skip[...].

ubuntu-22.04-64/535 was missing, so we saw an unbound-variable failure in tests executions.

This is an example of the error:

+ echo 'Transitional driver is in use, expecting: skip["ubuntu-22.04-64/535"]="transitional-driver"'
Transitional driver is in use, expecting: skip["ubuntu-22.04-64/535"]="transitional-driver"
/bin/bash: line 186: skip[$combi_key]: unbound variable

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.94%. Comparing base (89c2bd8) to head (9b98f8f).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #17399      +/-   ##
==========================================
+ Coverage   78.86%   78.94%   +0.07%     
==========================================
  Files        1403     1392      -11     
  Lines      196311   195984     -327     
  Branches     2462     2462              
==========================================
- Hits       154829   154722     -107     
+ Misses      32190    31983     -207     
+ Partials     9292     9279      -13     

Flag	Coverage Δ
unittests	78.94% <ø> (+0.07%)	⬆️

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[github-actions]

Thu Jul 23 15:39:55 UTC 2026
The following results are from: https://github.com/canonical/snapd/actions/runs/30015974584

No spread failures reported

Skipped tests from snapd-testing-skip

If you wish to have any of the below tests run in your PR, in your PR description, add 'unskip:' followed by a copy-and-pasted list of the below tests you wish to run (unskip plus test list must be valid yaml)

• garden:ubuntu-25.10-64:tests/main/apparmor-prompting-support

[bboozzoo]

Thanks!

[olivercalder]

Thanks!