Determine whether LaTeX can be removed from Linux docker image

[thomashampson]

Currently Latex is installed inside our docker images (see here). Determine whether we still need it. We are now installing texlive-core in our conda recipes, which might be enough.

The task here is to create a new docker image without the LaTeX installation and attempt to build the full suite of mantid packages. Then inspect the docs to check whether equations have rendered correctly. If so, roll out the new image to all runners.

[peterfpeterson]

I think texlive-core can be removed from the developer environment too. All the docs (user and developer) are built using the mathjax backend.

[thomashampson]

I think texlive-core can be removed from the developer environment too. All the docs (user and developer) are built using the mathjax backend.

There is a parent issue that encapsulates the docker image and the conda environments