feat: add getMultipleAccountsInfo which uses the getMultipleAccounts RPC method (#18736)

* feat(web3): add getMultipleAccountsInfo which uses the getMultipleAccounts RPC method

* fix: add airdrop to get multiple accounts info

Co-authored-by: Josh Hundley <josh.hundley@gmail.com>

web3.js/src/connection.ts

@@ -2407,6 +2407,28 @@ export class Connection {
     }
   }
 
+  /**
+   * Fetch all the account info for multiple accounts specified by an array of public keys
+   */
+  async getMultipleAccountsInfo(
+    publicKeys: PublicKey[],
+    commitment?: Commitment,
+  ): Promise<AccountInfo<Buffer>[] | null> {
+    const keys = publicKeys.map(key => key.toBase58());
+    const args = this._buildArgs([keys], commitment, 'base64');
+    const unsafeRes = await this._rpcRequest('getMultipleAccounts', args);
+    const res = create(
+      unsafeRes,
+      jsonRpcResultAndContext(nullable(array(AccountInfoResult))),
+    );
+    if ('error' in res) {
+      throw new Error(
+        'failed to get info for accounts ' + keys + ': ' + res.error.message,
+      );
+    }
+    return res.result.value;
+  }
+
   /**
    * Returns epoch activation information for a stake account that has been delegated
    */