chore(CI): migrate CB CI jobs to GHA

Author: josecorella

.github/workflows/coverage.yml

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+# This workflow runs code coverage checks.
+name: Code Coverage
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+  # Run once a day
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.12'  # Using latest Python version
+      
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install "tox < 4.0"
+          pip install -r dev_requirements/coverage-requirements.txt
+      
+      - name: Run coverage tests
+        env:
+          TOXENV: "coverage"
+          AWS_ENCRYPTION_SDK_PYTHON_INTEGRATION_TEST_AWS_KMS_KEY_ID: "arn:aws:kms:us-west-2:658956600833:key/b3537ef1-d8dc-4780-9f5a-55776cbb2f7f"
+        run: tox

.github/workflows/python-examples.yml

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+name: Python Examples Tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  examples:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.8.12', '3.9.7', '3.10.0', '3.11.0', '3.12.0']
+        include:
+          - python-version: '3.8.12'
+            tox-env: 'py38-examples'
+          - python-version: '3.9.7'
+            tox-env: 'py39-examples'
+          - python-version: '3.10.0'
+            tox-env: 'py310-examples'
+          - python-version: '3.11.0'
+            tox-env: 'py311-examples'
+          - python-version: '3.12.0'
+            tox-env: 'py312-examples'
+    
+    env:
+      TOXENV: ${{ matrix.tox-env }}
+      AWS_ENCRYPTION_SDK_PYTHON_INTEGRATION_TEST_AWS_KMS_KEY_ID: >-
+        arn:aws:kms:us-west-2:658956600833:key/b3537ef1-d8dc-4780-9f5a-55776cbb2f7f
+      AWS_ENCRYPTION_SDK_PYTHON_INTEGRATION_TEST_AWS_KMS_KEY_ID_2: >-
+        arn:aws:kms:eu-central-1:658956600833:key/75414c93-5285-4b57-99c9-30c1cf0a22c2
+      AWS_ENCRYPTION_SDK_PYTHON_INTEGRATION_TEST_AWS_KMS_MRK_KEY_ID_1: >-
+        arn:aws:kms:us-east-1:658956600833:key/mrk-80bd8ecdcd4342aebd84b7dc9da498a7
+
+    steps:
+      - uses: actions/checkout@v3
+      
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+          
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install "tox < 4.0"
+          
+      - name: Run examples tests with tox
+        run: tox

.github/workflows/python-integration.yml

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+name: Python Integration Tests
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  integration:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.8.12', '3.9.7', '3.10.0', '3.11.0', '3.12.0']
+        include:
+          - python-version: '3.8.12'
+            tox-env: 'py38-integ'
+          - python-version: '3.9.7'
+            tox-env: 'py39-integ'
+          - python-version: '3.10.0'
+            tox-env: 'py310-integ'
+          - python-version: '3.11.0'
+            tox-env: 'py311-integ'
+          - python-version: '3.12.0'
+            tox-env: 'py312-integ'
+    
+    env:
+      TOXENV: ${{ matrix.tox-env }}
+      AWS_ENCRYPTION_SDK_PYTHON_INTEGRATION_TEST_AWS_KMS_KEY_ID: >-
+        arn:aws:kms:us-west-2:658956600833:key/b3537ef1-d8dc-4780-9f5a-55776cbb2f7f
+      AWS_ENCRYPTION_SDK_PYTHON_INTEGRATION_TEST_AWS_KMS_MRK_KEY_ID_1: >-
+        arn:aws:kms:us-east-1:658956600833:key/mrk-80bd8ecdcd4342aebd84b7dc9da498a7
+
+    steps:
+      - uses: actions/checkout@v3
+      
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+          
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install "tox < 4.0"
+          
+      - name: Run integration tests with tox
+        run: tox