RepoSync with changes to commitMutation and updates to product code…

… to remove explicit type annotations and use typed `graphql` tags for mutations. (facebookexperimental#2277)

Summary:
Pull Request resolved: facebookexperimental#2277

This is a RepoSync diff with changes to the product code:

- Main change here is the updated `commitMutation` types that are using typed `graphql` tags.
- Also this diff contains changes (mostly automated) to the product code that removes the explicit type annotations. See details on the codemod here: https://www.internalfb.com/intern/wiki/Relay-team/Flow_Integration/
- Additionally, this diff contain new $FlowFixMe in the places where new types uncovered issues with types.

----

Individual diffs for review:
Product code changes: D48563977
FlowFixMe: D48563978

Reviewed By: captbaritone

Differential Revision: D48543114

fbshipit-source-id: 7b34a622d00a55d2e721b81e837efe9db1281178

packages/recoil-relay/RecoilRelay_graphQLMutationEffect.js

@@ -84,7 +84,7 @@ function graphQLMutationEffect<
       const mutationID = ++currentMutationID;
       const mutationVariables = variables(newValue);
       if (mutationVariables != null) {
-        commitMutation<$FlowFixMe>(environment, {
+        commitMutation(environment, {
           mutation,
           variables: mutationVariables,
           onError: error => {
@@ -100,6 +100,8 @@ function graphQLMutationEffect<
           },
           updater,
           optimisticUpdater,
+          /* $FlowFixMe[incompatible-call] error exposed when improving flow
+           * typing of commitMutation */
           optimisticResponse: optimisticResponse?.(newValue),
           uploadables,
         });