devices.qubit.measure uses csr_dot_products only when it is usable.

[astralcai]

There are a couple of scenarios when csr_dot_products is not usable for Sum and Hamiltonians:

1. When not all of the ops has a sparse matrix
2. When it's a legacy Hamiltonian and one of the ops are multi-wired.

Fixes #6264

[sc-73590]
[sc-73868]

[github-actions]

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Please edit doc/releases/changelog-dev.md with:

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.69%. Comparing base (cbc5a9d) to head (da9e3c1).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6278      +/-   ##
==========================================
- Coverage   99.69%   99.69%   -0.01%     
==========================================
  Files         443      444       +1     
  Lines       42022    42133     +111     
==========================================
+ Hits        41894    42004     +110     
- Misses        128      129       +1     

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[mudit2812]

Since a new property is added to Operator, we should probably also add tests for it

[PietropaoloFrisoni]

This looks good! I just have a couple of questions. Is this PR relevant for this bug?

[astralcai]

This looks good! I just have a couple of questions. Is this PR relevant for this bug?

Yes, Fixes #6264

[PietropaoloFrisoni]

LGTM