Arnau Casau

Switch `convert_2q_block_matrix.rs` to use `matmul` from `faer` and an explicit version of `kron`

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Part of #12120 This PR switches over the `convert_2q_block_matrix.rs` script to use `matmul` from `faer` instead of `dot` from `ndarray` to perform matrix multiplications. It turns out that using `faer`...

There are pages for qiskit 0.19 (to be determined if it affects to more versions) where we have a header for a methods section that is currently empty. Look at...

There are some pages in the API docs with circuits that are strangely displayed in comparison with others inside code blocks. Some of the circuits seem to have anchors associated...

There are two files with issues in the documentation that should be fixed by modifying the HTML in the [Box](https://ibm.ent.box.com/folder/246867452622) folder. The first issue is in the `qiskit.algorithms.eigensolvers.VQD.mdx` for qiskit...