Vectorize remaining arithmetic operators

[onelson]

Following on from #4585, #4587 which will have selected a single operator to vectorize from the following list:

• multiplication
• division
• modulo
• power
• addition
• subtraction

The work here is to vectorize the remaining items in the list.

Note that addition has higher complexity than the rest since we overload it for string concatenation. This means it may require extra effort to deliver compared to the rest.

DOD:

• provide a vectorized implementation of the remaining operators
• guard the implementation(s) with a feature flag
• temporary vectors for intermediate results need to be created and destroyed. (i.e. a * b * c the a * b temp vector needs to be created and destroyed after its consumed)
• Add Flux acceptance tests that hard codes the feature flag on to ensure we still have correctness