Update to NGINX Ingress 1.14.3

Update NGINX Ingress from 1.11.8 to 1.14.3 to address https://gitlab.com/gitlab-org/charts/gitlab/-/issues/6265.

The handling of the upgrade was inspired by #20 (comment 2102701538), with some changes for minimalism and a cleaner git log:

# Checkout all files from source tag
git checkout controller-v1.14.3 -- .
# Commit them
git commit ...
# Check for files present in our repo but not in upstream
git diff-tree -r --diff-filter=D HEAD controller-v1.14.3 | awk '{print $6}'
# Delete files are not needed by our fork
git diff-tree -r --diff-filter=D HEAD controller-v1.14.3 | awk '{print $6}' | grep '^charts/' | xargs rm
# Repeat for test/ internal/ rootfs/etc/nginx/lua/ magdefiles/ images/opentelemetry/ images/nginx/rootfs/patches/ .github/ docs/
# Commit files