Updated branch with 4.0 changes

[ctubbsii]

Updated accumulo-testing branch with Accumulo 4.0.0-SNAPSHOT changes. Copied AccessExpression normalization code, which is used to replace ColumnVisibility.flatten, from ParseExamples in Accumulo-Access.

[ctubbsii]

This PR preserves a copy of a branch that was recently deleted that @dlmarion was working on. I didn't know if it needed to be kept, but since it contained unmerged changes, I made a copy of the deleted branch, and opened this PR for him to review, in case anything from it is still needed. There is one small conflict.

[dlmarion]

@ctubbsii - Thanks for preserving this. The issue I believe was that my local copy of main was out of date and I didn't realize it. Locally I saw it still depending on Accumulo 3.1.0-SNAPSHOT. I didn't remember the history of the repo and that elasticity had already been merged to main. So I started updating my local copy of elasticity with the latest Accumulo 4.0.0-SNAPSHOT changes. My approach to resolving the removal of ColumnVisibility.flatten was to try and retain the normalization and deduplication that it did versus just using the expression. It looks like @DomGarguilo resolved this issue in #290, so I decided to abort my change.

main current builds with no issue.