[python] Fix dimension of sliced SolutionArray methods

Changes proposed in this pull request

Fix dimension of 'inherited' Solution methods
Disable some problematic SolutionArray methods when phase is an Interface

If applicable, fill in the issue number this pull request is fixing

Closes #1717

If applicable, provide an example illustrating new features this pull request is introducing

In [1]: import cantera as ct
   ...: gas = ct.Solution("h2o2.yaml")
   ...: gas.TPY = 900, 1.e05, {"H2": 1.0, "O2": 1.0}

In [2]: arr = ct.SolutionArray(gas, states=[list(gas.state)] * 10)

In [3]: arr("H2").Y.shape
Out[3]: (10, 1)

In [4]: arr("H2").net_production_rates.shape
Out[4]: (10, 1)

Comments

This is to make the interface somewhat consistent with Solution; there are some differences, e.g. round vs square brackets, or passing of lists vs argument lists, where fixes go beyond the scope of this PR. Also, Solution currently does not slice gas["O2"].binary_diff_coeffs correctly, so this PR merely ensures that implementations are mostly consistent.

Checklist

[x] The pull request includes a clear description of this code change
[x] Commit messages have short titles and reference relevant issues
[x] Build passes (scons build & scons test) and unit tests address code coverage
[x] Style & formatting of contributed code follows contributing guidelines
[x] The pull request is ready for review

Cantera / cantera

[python] Fix dimension of sliced SolutionArray methods #1726

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