refactor: refactor all platform code into a single gradle project (removes composite builds) (#13097)

Author: cgardens

.github/workflows/fe-validate-links.yml

@@ -32,8 +32,8 @@ jobs:
           org.gradle.vfs.watch=false
           EOF
 
-      - name: Run :airbyte-webapp:validateLinks
-        run: ./gradlew --no-daemon :airbyte-webapp:validateLinks --scan -DciMode=true
+      - name: Run :oss:airbyte-webapp:validateLinks
+        run: ./gradlew --no-daemon :oss:airbyte-webapp:validateLinks --scan -DciMode=true
 
       - name: Publish Failures to dev-frontend channel
         uses: abinoda/slack-action@master

.github/workflows/gradle.yml

@@ -156,7 +156,7 @@ jobs:
           # todo (cgardens): temporarily skipping airbyte-commons-worker because one of the tests uses too much memory. we are
           # adjusting the test to use a more reasonable amount of memory. https://github.com/airbytehq/oncall/issues/4415
           # command: ./gradlew build javadoc --scan
-          command: ./gradlew build -x :airbyte-commons-worker:test javadoc --scan
+          command: ./gradlew build -x :oss:airbyte-commons-worker:test javadoc --scan
           attempt_limit: 3
           attempt_delay: 5000 # in ms