[Frontend] Fix decomposition tests

[erick-xanadu]

Context: Recent changes in the TOML files broke some tests.

Description of the Change: Fix those tests.

Benefits: Latest/latest/latest passes again (at least for lightning.qubit).

Comment:

The minimum version of pennylane-lightning required is 0.37.0-dev7 but those wheels failed to be uploaded. I have used 0.37.0-dev9. If the minimum version required is required for this PR, let me know and I will ask the team to push wheels for -dev7

[sc-63376]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.08%. Comparing base (0dc7538) to head (02a2211).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #745      +/-   ##
==========================================
- Coverage   98.10%   98.08%   -0.03%     
==========================================
  Files          69       69              
  Lines        9550     9550              
  Branches      746      746              
==========================================
- Hits         9369     9367       -2     
- Misses        147      148       +1     
- Partials       34       35       +1     

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[github-actions]

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[dime10]

I'm not sure how much of this PR is clashing with #718 and #712, could you double check?

[erick-xanadu]

I'm not sure how much of this PR is clashing with #718 and #712, could you double check?

I'm happy to close this PR without merging if #718 and #712 would fix latest/latest/latest.

[grwlf]

I'm not sure how much of this PR is clashing with #718 and #712, could you double check?

I'm happy to close this PR without merging if #718 and #712 would fix latest/latest/latest.

We need #712 . I would suggest to merge it instead of this PR. #712 addresses exactly this issue, but in my opinion - in a more systematic way: it adds an option to modify capabilities directly so we no longer need to stick to a particular toml syntax in tests.

The #718 fixes another toml leftover, it requires #712 as a prerequisite.

[dime10]

I'm not sure how much of this PR is clashing with #718 and #712, could you double check?

I'm happy to close this PR without merging if #718 and #712 would fix latest/latest/latest.

We need #712 . I would suggest to merge it instead of this PR. #712 addresses exactly this issue, but in my opinion - in a more systematic way: it adds an option to modify capabilities directly so we no longer need to stick to a particular toml syntax in tests.

The #718 fixes another toml leftover, it requires #712 as a prerequisite.

Let's give those PRs the final push! @grwlf can you ensure relevant discussions are resolved with the reviewers and merged this week?