Typescript compile issues

### This bug report should include:

I'm trying to upgrade to Typescript 4.7.4 and I'm getting some compile errors in the @apollo/gateway library.

```

node_modules/@apollo/gateway/src/datasources/RemoteGraphQLDataSource.ts:122:7 - error TS2774: This condition will always return true since this function is always defined. Did you mean to call it instead?

122 options.incomingRequestContext.overallCachePolicy?.restrict
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/@apollo/gateway/src/schema-helper/addExtensions.ts:8:7 - error TS2698: Spread types may only be created from object types.

8 ...schema.extensions.apollo,
~~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/@apollo/gateway/src/schema-helper/addExtensions.ts:10:12 - error TS2571: Object is of type 'unknown'.

10 ...schema.extensions.apollo?.gateway,
~~~~~~~~~~~~~~~~~~~~~~~~
```

I was originally using 0.51.0, but I'm seeing the same error in the `RemoteGraphQLDataSource` when upgrading to 2.0.5.

Is there a maximum version of Typescript that is supported by @apollo/federation?

Thanks!

Start by reproducing the TypeScript 4.7.4 compile errors in @apollo/gateway, focusing on src/datasources/RemoteGraphQLDataSource.ts and src/schema-helper/addExtensions.ts. Check the supported TypeScript range for the reported @apollo/federation versions and determine whether the errors can be resolved; done means the affected versions compile cleanly or their compatibility limits are documented.

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