Adds Dependabot to all python services (SatcherInstitute#3224)

# Description and Motivation
<!--- bulleted, high level items. use keywords (eg "closes SatcherInstitute#144" or
"fixes #4323") -->

closes SatcherInstitute#1649 

## Has this been tested? How?

works for `python/` so far

## Types of changes

(leave all that apply)

- Refactor / chore

## New frontend preview link is below in the Netlify comment 😎

.github/dependabot.yml

@@ -43,3 +43,53 @@ updates:
           - "minor"
           - "patch"
     open-pull-requests-limit: 2
+  - package-ecosystem: "pip"
+    directory: "exporter/"
+    schedule:
+      interval: "weekly"
+    groups:
+      minor-python:
+        update-types:
+          - "minor"
+          - "patch"
+    open-pull-requests-limit: 2
+  - package-ecosystem: "pip"
+    directory: "run_gcs_to_bq/"
+    schedule:
+      interval: "weekly"
+    groups:
+      minor-python:
+        update-types:
+          - "minor"
+          - "patch"
+    open-pull-requests-limit: 2
+  - package-ecosystem: "pip"
+    directory: "run_ingestion/"
+    schedule:
+      interval: "weekly"
+    groups:
+      minor-python:
+        update-types:
+          - "minor"
+          - "patch"
+    open-pull-requests-limit: 2
+  - package-ecosystem: "pip"
+    directory: "data_server/"
+    schedule:
+      interval: "weekly"
+    groups:
+      minor-python:
+        update-types:
+          - "minor"
+          - "patch"
+    open-pull-requests-limit: 2
+  - package-ecosystem: "pip"
+    directory: "e2e_tests/"
+    schedule:
+      interval: "weekly"
+    groups:
+      minor-python:
+        update-types:
+          - "minor"
+          - "patch"
+    open-pull-requests-limit: 2