chore(ci): fix aws auth tests

[emadum]

Description

Upgrades the boto3 python dependency used in the AWS auth tests by means of the newly added activate_venv.sh script.

NODE-3056

What changed?

Are there any files to ignore?

[ShaneHarvey]

This will upgrade boto3 for the entire system. This is bad practice because it can break applications that use the system python and even break future Evergreen tasks that run on this machine. Instead you should create and use a virtualenv, like this:

          # The aws_e2e_assume_role script requires python3 with boto3.
          virtualenv -p ${python3_binary} mongovenv
          if [ "Windows_NT" = "$OS" ]; then
            . mongovenv/Scripts/activate
          else
            . mongovenv/bin/activate
          fi
          pip install --upgrade boto3

Since this is a virtualenv you'll need to activate it before running each JS script, eg:

          # The mongovenv was created earlier.
          if [ "Windows_NT" = "$OS" ]; then
            . mongovenv/Scripts/activate
          else
            . mongovenv/bin/activate
          fi
          cd ${DRIVERS_TOOLS}/.evergreen/auth_aws
          ${MONGODB_BINARIES}/mongo aws_e2e_regular_aws.js

Ideally the drivers-evergreen-tools auth testing scripts would take care of these problems so that all drivers don't need to add this finicky boilerplate.

[ShaneHarvey]

Oh, and thanks for fixing this bug! I was able to fix it in pymongo too: mongodb/mongo-python-driver#562

[emadum]

Note: depends on mongodb-labs/drivers-evergreen-tools#138

[durran]

LGTM