Update Workflow Versions to Remove node16 Deprecation Warnings

[jesuyedavid]

Notable Changes:

1. We added two new jobs: merge_multiple_artifacts and overwrite_artifact in .github/workflows/build_i18n.yml to handle merging multiple locale files into the build-output-US and build-output-EU artifacts. This was necessary since we have to handle no longer being able to have multiple jobs in the same workflow write to one artifact name and mutate it, a breaking change in action/upload-artifact@v4. Since build_and_deploy_i18n.yml calls both build.yml and build_i18n.yml, we can't have both write an artifact called build-output-US unless we pass the overwrite: true input in the latter. The action/upload-artifact/merge@v4 doesn't allow overwriting, so we need an additional step of merging and uploading with a temporary name and then downloading the merged artifact and re-uploading to overwrite the correct name.

2. We bumped google-github-actions/auth and google-github-actions/upload-cloud-storage from v0 to v2

3. Updated actions/checkout, actions/setup-node, actions/upload-artifact, actions/download-artifact, and aws-actions/configure-aws-credentials actions to v4

J=WAT-4020
TEST=manual

Testing was done in a forked repo. View actions to see testing details and test commits. We also checked the US/EU build artifact unzipped files to ensure they are uploaded to AWS/GCP properly and that they look similar to build files prior to this update. Finally, we did local testing from the Answers-Hitchhiker-Theme repo's test site that pointed to our dev assets in AWS. The dev bucket in GCP did not have the correct permissions to allow local testing, so this local testing will be done after merging this PR and the changes from develop are pushed to canary in GCP.

[coveralls]

coverage: 62.092%. remained the same
when pulling 856f988 on dev/update-workflow
into ee4333d on develop.