changed install_katex.sh to install_docs_reqs.sh, added install doxygen (#77907)

Fixes #77399

Increase CI stability by migrating a dependency to Docker to minimize risk of failure in installation. Installing doxygen in install_docs_reqs.sh instead of the cpp docs script.

**Test Plan**: cpp docs build passes
Pull Request resolved: https://github.com/pytorch/pytorch/pull/77907
Approved by: https://github.com/seemethere, https://github.com/janeyx99

.circleci/docker/common/install_docs_reqs.sh

@@ -17,6 +17,8 @@ if [ -n "$KATEX" ]; then
   apt-get install -y --no-install-recommends yarn
   yarn global add katex --prefix /usr/local
 
+  sudo apt-get -y install doxygen
+
   apt-get autoclean && apt-get clean
   rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 

.circleci/docker/ubuntu-cuda/Dockerfile

@@ -20,8 +20,8 @@ RUN bash ./install_user.sh && rm install_user.sh
 
 # Install katex
 ARG KATEX
-ADD ./common/install_katex.sh install_katex.sh
-RUN bash ./install_katex.sh && rm install_katex.sh
+ADD ./common/install_docs_reqs.sh install_docs_reqs.sh
+RUN bash ./install_docs_reqs.sh && rm install_docs_reqs.sh
 
 # Install conda and other packages (e.g., numpy, pytest)
 ENV PATH /opt/conda/bin:$PATH

.circleci/docker/ubuntu/Dockerfile

@@ -30,8 +30,8 @@ RUN bash ./install_user.sh && rm install_user.sh
 
 # Install katex
 ARG KATEX
-ADD ./common/install_katex.sh install_katex.sh
-RUN bash ./install_katex.sh && rm install_katex.sh
+ADD ./common/install_docs_reqs.sh install_docs_reqs.sh
+RUN bash ./install_docs_reqs.sh && rm install_docs_reqs.sh
 
 # Install conda and other packages (e.g., numpy, pytest)
 ENV PATH /opt/conda/bin:$PATH

.circleci/scripts/cpp_doc_push_script.sh

@@ -51,8 +51,6 @@ git clone https://github.com/pytorch/cppdocs
 
 set -ex
 
-sudo apt-get -y install doxygen
-
 # Generate ATen files
 pushd "${pt_checkout}"
 pip install -r requirements.txt