PLT-1569: Add draft PR filter for pull request workflow (#1696)

## 🎫 Ticket

https://jira.cms.gov/browse/PLT-1569

## 🛠 Changes

Adds a flag that excludes draft PRs from the pull request workflow.

## ℹ️ Context

We don't want to be deploying _every_ change we commit to pull requests
in the repo.

## 🧪 Validation

With this added, the pull request workflow does not run, as seen in this
example: #1663

Author: gfreeman-navapbc

.github/workflows/libs-pull-request.yml

@@ -3,6 +3,11 @@ run-name: Libs-pull-request
 
 on:
   pull_request:
+    types: [opened, reopened, synchronize, ready_for_review]
+    paths:
+      - 'libs/**'
+    branches:
+      - main
 
 permissions:
   contents: read
@@ -20,4 +25,4 @@ jobs:
   sonarqube:
     if: github.event.pull_request.draft == false
     uses: ./.github/workflows/libs-sonarqube.yml
-    secrets: inherit
+    secrets: inherit

.github/workflows/pull-request.yml

@@ -2,6 +2,7 @@ name: pull request jobs
 
 on:
   pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
     paths-ignore:
       - libs/**
       - lambdas/**
@@ -15,18 +16,21 @@ jobs:
     uses: ./.github/workflows/unit-integration-test.yml
     secrets: inherit
   build-deploy-api:
+    if: github.event.pull_request.draft == false
     uses: ./.github/workflows/build-deploy.yml
     with:
       environment: test
       module: api
     secrets: inherit
   build-deploy-worker:
+    if: github.event.pull_request.draft == false
     uses: ./.github/workflows/build-deploy.yml
     with:
       environment: test
       module: worker
     secrets: inherit
   e2e-test:
+    if: github.event.pull_request.draft == false
     needs: [build-deploy-api, build-deploy-worker]
     uses: ./.github/workflows/e2e-test.yml
     with: