[Feature:Autograding] Add pdflatex image (#54)

### What is the current behavior?
Creates a docker file for pdflatex for
more_autograding_examples/test_notes_upload/

Closes Submitty/Submitty#10940

Author: lavalleeale

dockerfiles/pdflatex/2021/Dockerfile

@@ -0,0 +1,9 @@
+FROM ubuntu:22.04
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update
+# 2021 is the current version of texlive on apt-get as of 10/2024
+RUN apt-get install -qqy texlive-latex-base=2021.20220204-1 texlive-plain-generic=2021.20220204-1 texlive-latex-extra=2021.20220204-1
+RUN apt-get install -qqy python3.10 pip
+
+RUN pip install PyPDF2==3.0.1

dockerfiles/pdflatex/metadata.json

@@ -0,0 +1,4 @@
+{
+  "pushLatest": true,
+  "latestTag": "pdflatex"
+}