chore(NODE-6502) Use a python venv wherever we use Python in driver CI (mongodb#4322)

Co-authored-by: Bailey Pearson <[email protected]>
(cherry picked from commit db4eff5)

Author: blink1073

.evergreen/config.in.yml

@@ -228,7 +228,10 @@ functions:
           # Get access to the AWS temporary credentials:
           echo "adding temporary AWS credentials to environment"
           # CSFLE_AWS_TEMP_ACCESS_KEY_ID, CSFLE_AWS_TEMP_SECRET_ACCESS_KEY, CSFLE_AWS_TEMP_SESSION_TOKEN
-          . "$DRIVERS_TOOLS"/.evergreen/csfle/set-temp-creds.sh
+          pushd "$DRIVERS_TOOLS"/.evergreen/csfle
+          . ./activate-kmstlsvenv.sh
+          . ./set-temp-creds.sh
+          popd
 
           MONGODB_URI="${MONGODB_URI}" \
           AUTH=${AUTH} SSL=${SSL} TEST_CSFLE=true \

.evergreen/config.yml

@@ -199,7 +199,10 @@ functions:
           # Get access to the AWS temporary credentials:
           echo "adding temporary AWS credentials to environment"
           # CSFLE_AWS_TEMP_ACCESS_KEY_ID, CSFLE_AWS_TEMP_SECRET_ACCESS_KEY, CSFLE_AWS_TEMP_SESSION_TOKEN
-          . "$DRIVERS_TOOLS"/.evergreen/csfle/set-temp-creds.sh
+          pushd "$DRIVERS_TOOLS"/.evergreen/csfle
+          . ./activate-kmstlsvenv.sh
+          . ./set-temp-creds.sh
+          popd
 
           MONGODB_URI="${MONGODB_URI}" \
           AUTH=${AUTH} SSL=${SSL} TEST_CSFLE=true \

.evergreen/run-custom-csfle-tests.sh

@@ -20,7 +20,10 @@ set -o errexit  # Exit the script with error if any of the commands fail
 # Get access to the AWS temporary credentials:
 echo "adding temporary AWS credentials to environment"
 # CSFLE_AWS_TEMP_ACCESS_KEY_ID, CSFLE_AWS_TEMP_SECRET_ACCESS_KEY, CSFLE_AWS_TEMP_SESSION_TOKEN
-. "$DRIVERS_TOOLS"/.evergreen/csfle/set-temp-creds.sh
+pushd "$DRIVERS_TOOLS"/.evergreen/csfle
+. ./activate-kmstlsvenv.sh
+. ./set-temp-creds.sh
+popd
 
 ABS_PATH_TO_PATCH=$(pwd)
 

.evergreen/run-tests.sh

@@ -45,11 +45,13 @@ if [[ -z "${CLIENT_ENCRYPTION}" ]]; then
   unset AWS_ACCESS_KEY_ID;
   unset AWS_SECRET_ACCESS_KEY;
 else
-  pip install --upgrade boto3
+  pushd "$DRIVERS_TOOLS/.evergreen/csfle"
+  . ./activate-kmstlsvenv.sh
   # Get access to the AWS temporary credentials:
   echo "adding temporary AWS credentials to environment"
   # CSFLE_AWS_TEMP_ACCESS_KEY_ID, CSFLE_AWS_TEMP_SECRET_ACCESS_KEY, CSFLE_AWS_TEMP_SESSION_TOKEN
-  source "$DRIVERS_TOOLS"/.evergreen/csfle/set-temp-creds.sh
+  source set-temp-creds.sh
+  popd
 fi
 
 npm install mongodb-client-encryption

test/readme.md

@@ -384,10 +384,10 @@ The following steps will walk you through how to run the tests for CSFLE.
 
 1. Set temporary AWS credentials
 
-  ```
-  pip3 install boto3
-  PYTHON="python3" source /path/to/mongodb-labs/drivers-evergreen-tools/.evergreen/csfle/set-temp-creds.sh
-  ```
+   ```
+   source /path/to/mongodb-labs/drivers-evergreen-tools/.evergreen/csfle/activate-kmstlsvenv.sh
+   source /path/to/mongodb-labs/drivers-evergreen-tools/.evergreen/csfle/set-temp-creds.sh
+   ```
 
   Alternatively for fish users the following script can be substituted for set-temp-creds.sh: