adding metaphlan version 4.1.1

There's a new version of metaphlan!

According to the release notes, there are some new features https://github.com/biobakery/MetaPhlAn/releases/tag/4.1.1

There are new, updated databases, but these are not intended to be included in the image.

Since the conda bin is in path, we don't need the mamba dockerfile activate, so I've removed it.

Here are is the diff between 4.1.0 and 4.1.1:

$ diff metaphlan/4.1.0/Dockerfile metaphlan/4.1.1/Dockerfile 
1c1
< FROM mambaorg/micromamba:1.5.6 as app
---
> FROM mambaorg/micromamba:1.5.8 as app
3c3
< ARG METAPHLAN_VER="4.1.0"
---
> ARG METAPHLAN_VER="4.1.1"
9c9
< LABEL base.image="mambaorg/micromamba:1.5.6"
---
> LABEL base.image="mambaorg/micromamba:1.5.8"
36,37c36
< ENV ENV_NAME="base"
< ARG MAMBA_DOCKERFILE_ACTIVATE=1
---
> RUN metaphlan --help

Pull Request (PR) checklist:

[X] Include a description of what is in this pull request in this message.
[X] The dockerfile successfully builds to a test target for the user creating the PR. (i.e. docker build --tag samtools:1.15test --target test docker-builds/samtools/1.15 )
[X] Directory structure as name of the tool in lower case with special characters removed with a subdirectory of the version number (i.e. spades/3.12.0/Dockerfile)
- [X] (optional) All test files are located in same directory as the Dockerfile (i.e. shigatyper/2.0.1/test.sh)
[X] Create a simple container-specific README.md in the same directory as the Dockerfile (i.e. spades/3.12.0/README.md)
- [X] If this README is longer than 30 lines, there is an explanation as to why more detail was needed
[X] Dockerfile includes the recommended LABELS
[X] Main README.md has been updated to include the tool and/or version of the dockerfile(s) in this PR
[X] Program_Licenses.md contains the tool(s) used in this PR and has been updated for any missing

StaPH-B / docker-builds

adding metaphlan version 4.1.1 #996