Minor: make password and username field non required in email config form (#16133)

* Minor: make password field as non required in email config form

* chore: Update email config form to make password field non-required

openmetadata-spec/src/main/resources/json/schema/email/smtpSettings.json

@@ -52,5 +52,5 @@
     }
   },
   "additionalProperties": false,
-  "required": ["serverEndpoint", "serverPort", "username", "password", "senderMail", "openMetadataUrl"]
+  "required": ["serverEndpoint", "serverPort", "senderMail", "openMetadataUrl"]
 }

openmetadata-ui/src/main/resources/ui/src/components/Settings/Email/EmailConfigForm/EmailConfigForm.component.tsx

@@ -49,16 +49,10 @@ function EmailConfigForm({
       validateMessages={VALIDATION_MESSAGES}
       onFinish={onSubmit}
       onFocus={onFocus}>
-      <Item
-        label={t('label.username')}
-        name="username"
-        rules={[{ required: true }]}>
+      <Item label={t('label.username')} name="username">
         <Input data-testid="username-input" id="root/username" />
       </Item>
-      <Item
-        label={t('label.password')}
-        name="password"
-        rules={[{ required: true }]}>
+      <Item label={t('label.password')} name="password">
         <Input
           data-testid="password-input"
           id="root/password"

openmetadata-ui/src/main/resources/ui/src/components/Settings/Email/EmailConfigForm/EmailConfigForm.test.tsx

@@ -144,4 +144,27 @@ describe('Email Config Form Component', () => {
 
     expect(mockOnSubmit).not.toHaveBeenCalled();
   });
+
+  it('should call onSubmit if password and username is not filled', async () => {
+    render(
+      <EmailConfigForm
+        {...mockProps}
+        emailConfigValues={{
+          ...emailConfigValues,
+          password: '',
+          username: '',
+        }}
+      />
+    );
+
+    await act(async () => {
+      fireEvent.click(screen.getByText('label.submit'));
+    });
+
+    expect(mockOnSubmit).toHaveBeenCalledWith({
+      ...emailConfigValues,
+      password: '',
+      username: '',
+    });
+  });
 });