feat: add application.UseEmailAsSamlNameId field for SAML (#3203)

* feat: Add option to use email as SAML NameID based on application config

- Updated NewSamlResponse11 to accept an application parameter.
- Conditionally set SAML NameIdentifier to user's email or username based on application.UseEmailAsNameId.

* refactor: Update GetValidationBySaml to pass application to NewSamlResponse11

- Modified GetValidationBySaml function to include application parameter in NewSamlResponse11 call.

* feat: Rename field and update logic for using Email as SAML NameID

- Renamed the `UseEmailAsNameId` field to `UseEmailAsSamlNameId` in the `Application` struct.
- Updated `NewSamlResponse` and `NewSamlResponse11` functions to use `UseEmailAsSamlNameId` for setting the NameID value.
- Modified `ApplicationEditPage.js` to reflect the field name change and update the corresponding logic.

web/src/ApplicationEditPage.js

@@ -703,6 +703,16 @@ class ApplicationEditPage extends React.Component {
             }} />
           </Col>
         </Row>
+        <Row style={{marginTop: "20px"}}>
+          <Col style={{marginTop: "5px"}} span={(Setting.isMobile()) ? 19 : 2}>
+            {Setting.getLabel(i18next.t("application:Use Email as NameID"), i18next.t("application:Use Email as NameID - Tooltip"))} :
+          </Col>
+          <Col span={1}>
+            <Switch checked={this.state.application.useEmailAsSamlNameId} onChange={checked => {
+              this.updateApplicationField("useEmailAsSamlNameId", checked);
+            }} />
+          </Col>
+        </Row>
         <Row style={{marginTop: "20px"}} >
           <Col style={{marginTop: "5px"}} span={(Setting.isMobile()) ? 19 : 2}>
             {Setting.getLabel(i18next.t("application:Enable SAML POST binding"), i18next.t("application:Enable SAML POST binding - Tooltip"))} :