Sync the e2e folder when updating the template (#728)

## Ticket

Resolves #727

## Changes

Adds `e2e` to the list of folders to install / update

## Context for reviewers

You can see the issue by looking at the different between these two
commits

[template-infra
commit](48c7656)
[platform-test
commit](navapbc/platform-test@8fcbbae#diff-76ed074a9305c04054cdebb9e9aad2d818052b07091de1f20cad0bbac34ffb52)

The platform test commit is missing the `e2e` folder

## Testing

I haven't tested this, since the change is small enough that it doesn't
seem worthwhile to do a standalone test for it. LMK if you disagree,
though.

template-only-bin/install-template

@@ -16,6 +16,7 @@ cp -r \
  bin \
  docs \
  infra \
+ e2e \
  Makefile \
  .dockleconfig \
  .gitignore \

template-only-bin/update-template

@@ -24,7 +24,7 @@ git checkout "${target_version}"
 target_version_hash=$(git rev-parse HEAD)
 
 # Note: Keep this list in sync with the files copied in install-template
-git diff "${current_version}" "${target_version}" --binary -- .github bin docs infra Makefile .dockleconfig .gitignore .grype.yml .hadolint.yaml .trivyignore .terraform-version > update.patch
+git diff "${current_version}" "${target_version}" --binary -- .github bin docs infra e2e Makefile .dockleconfig .gitignore .grype.yml .hadolint.yaml .trivyignore .terraform-version > update.patch
 cd -
 
 echo "Applying patch"