test: fix flaky erc20 send token e2e (#28775)

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## **Description**

The issue is that sometimes when clicking on the watchAssets button from
the test dapp the metamask dialog does not open. The test dapp button is
present and enabled but for some reason clicking on it does nothing.
However if you wait for a second and then click this seems to solve the
issue.

Also tried to wait until the page is loaded, element is present, visible
and enabled, however, the flakiness persists. Hence added a hardcoded
wait.

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## **Related issues**

Fixes:
[#28700](#28700)

## **Manual testing steps**

1. Go to this page...
2.
3.

## **Screenshots/Recordings**

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before and after of your change. -->

### **Before**

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### **After**

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- [ ] I've manually tested the PR (e.g. pull and build branch, run the
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Co-authored-by: Harika <[email protected]>

test/e2e/tests/confirmations/transactions/erc20-token-send-redesign.spec.ts

@@ -127,6 +127,7 @@ async function createWalletInitiatedTransactionAndAssertDetails(
 
   await testDapp.openTestDappPage({ contractAddress, url: DAPP_URL });
 
+  await driver.delay(1000);
   await testDapp.clickERC20WatchAssetButton();
 
   await driver.switchToWindowWithTitle(WINDOW_TITLES.Dialog);
@@ -172,6 +173,7 @@ async function createDAppInitiatedTransactionAndAssertDetails(
 
   await testDapp.openTestDappPage({ contractAddress, url: DAPP_URL });
 
+  await driver.delay(1000);
   await testDapp.clickERC20WatchAssetButton();
 
   await driver.delay(veryLargeDelayMs);