fix(module-federation): additionalShared should check node_modules wh…

…en applying to support transitive deps #28137 (#28216)

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## Current Behavior
<!-- This is the behavior we have today -->
Transitive deps may not exist on the project graph or be installed in
the root package.json file.
They could require the singleton pattern and should use the
`additionalShared` functionality.

However, the additionalShared will check project graph and root
package.json, erroring if the package cannot be found.

The last resort should be to use `require.resolve` to check the
node_modules folder to find the package.json of the package and select a
version from it.


## Expected Behavior
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-->

## Related Issue(s)
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merged. -->

Fixes #28137

packages/webpack/src/utils/module-federation/share.ts

@@ -306,10 +306,14 @@ function addStringDependencyToSharedConfig(
 
     sharedConfig[dependency] = config;
   } else {
-    throw new Error(
-      `The specified dependency "${dependency}" in the additionalShared configuration does not exist in the project graph. ` +
-        `Please check your additionalShared configuration and make sure you are including valid workspace projects or npm packages.`
-    );
+    const pkgJsonPath = require.resolve(`${dependency}/package.json`);
+    if (!pkgJsonPath) {
+      throw new Error(
+        `Could not find package ${dependency} when applying it as a shared package. Are you sure it has been installed?`
+      );
+    }
+    const pkgJson = readJsonFile(pkgJsonPath);
+    const config = getNpmPackageSharedConfig(dependency, pkgJson.version);
   }
 }