Switch the gradle plugin to gratatouille

[martinbonnin]

Advantages:

• Removes a lot of boilerplate code (Workers, Tasks, etc..) and enforces all the tasks use the same coding conventions.
• Makes the build faster because there is no need to call R8 anymore (took ~30s on average).
• Easier debugging and better stacktraces because there is no relocation anymore.

User-facing changes:

• com.apollographql.apollo.compiler.* is not available anymore from the build script classpath.
  • This PR adds apollo-compiler symbol overlays as DeprecationLevel.Error.
  • This means someone trying to have both apollo-gradle-plugin and apollo-compiler in their classpath will get an error when trying to use those for presumably legit reasons. But the workaround of just using the String literal is easy.
• a bunch of CLI tasks are removed (push, convert, download).
  • Issue here for tracking.
  • We could reintroduce them back in the Gradle plugin if there is push back.
• It's not possible to control the filesystem location of task outputs anymore.
  • Doing so now triggers an error.
  • If the file need to be in a very specific place, users should copy them.
• The operationOutput manifest format is not supported anymore and replaced with persistedQueryManifest.
• Services starting with a non-letter char will be capitalized slightly differently: generate_ServiceApolloSources -> generate_serviceApolloSources. I think this is more in-line with what Gradle is doing generally.

[svc-apollo-docs]

✅ Docs preview ready

The preview is ready to be viewed. View the preview

File Changes

0 new, 5 changed, 0 removed

* (developer-tools)/kotlin/v5/advanced/persisted-queries.mdx
* (developer-tools)/kotlin/v5/advanced/plugin-configuration.mdx
* (developer-tools)/kotlin/v5/caching/declarative-ids.mdx
* (developer-tools)/kotlin/v5/caching/programmatic-ids.mdx
* (developer-tools)/kotlin/v5/essentials/modules.mdx

Build ID: 8b06e9ec2dc59142095d6e57

URL: https://www.apollographql.com/docs/deploy-preview/8b06e9ec2dc59142095d6e57

[apollo-librarian]

✅ Docs preview ready

The preview is ready to be viewed. View the preview

File Changes

0 new, 5 changed, 0 removed

* (developer-tools)/kotlin/v5/advanced/persisted-queries.mdx
* (developer-tools)/kotlin/v5/advanced/plugin-configuration.mdx
* (developer-tools)/kotlin/v5/caching/declarative-ids.mdx
* (developer-tools)/kotlin/v5/caching/programmatic-ids.mdx
* (developer-tools)/kotlin/v5/essentials/modules.mdx

Build ID: caad65a52201191c4c9a2829

URL: https://www.apollographql.com/docs/deploy-preview/caad65a52201191c4c9a2829

[BoD]

🚀 🐀 🧑‍🍳