fix: sanitize branch linker logs (#843)

Author: Kamil Sobol

.changeset/friendly-jokes-roll.md

@@ -0,0 +1,5 @@
+---
+'@aws-amplify/backend': patch
+---
+
+Remove excessive logging from branch linker.

packages/backend/src/engine/branch-linker/lambda/branch_linker.ts

@@ -87,7 +87,9 @@ export class AmplifyBranchLinkerCustomResourceEventHandler {
     }
 
     const branch: Branch = await this.getBranch(appId, branchName);
-    console.info(`Received branch details ${JSON.stringify(branch)}`);
+    console.info(
+      `Received details of branchName=${branchName} of appId=${appId}`
+    );
     // Populate update command input with existing values, so we don't lose them.
     const updateBranchCommandInput: UpdateBranchCommandInput = {
       appId,
@@ -114,7 +116,7 @@ export class AmplifyBranchLinkerCustomResourceEventHandler {
     }
 
     console.info(
-      `Sending branch update ${JSON.stringify(updateBranchCommandInput)}`
+      `Sending update of branchName=${branchName} of appId=${appId}`
     );
     await this.amplifyClient.send(
       new UpdateBranchCommand(updateBranchCommandInput)