Align dast site validation frontend with backend

Fix incorrect value and remove redundant prefix.

ee/app/assets/javascripts/security_configuration/dast_site_profiles_form/components/dast_site_validation.vue

@@ -146,7 +146,7 @@ export default {
       return DAST_SITE_VALIDATION_METHODS[this.validationMethod].i18n.locationStepLabel;
     },
     httpHeader() {
-      return `${DAST_SITE_VALIDATION_HTTP_HEADER_KEY}: uuid-code-${this.token}`;
+      return `${DAST_SITE_VALIDATION_HTTP_HEADER_KEY}: ${this.token}`;
     },
   },
   watch: {
@@ -193,7 +193,7 @@ export default {
             projectFullPath: this.fullPath,
             dastSiteTokenId: this.tokenId,
             validationPath: this.validationPath,
-            strategy: this.validationMethod,
+            validationStrategy: this.validationMethod,
           },
         });
         if (errors?.length) {

ee/app/assets/javascripts/security_configuration/dast_site_profiles_form/constants.js

 import { s__ } from '~/locale';
 
 export const DAST_SITE_VALIDATION_METHOD_TEXT_FILE = 'TEXT_FILE';
-export const DAST_SITE_VALIDATION_METHOD_HTTP_HEADER = 'HTTP_HEADER';
+export const DAST_SITE_VALIDATION_METHOD_HTTP_HEADER = 'HEADER';
 
 export const DAST_SITE_VALIDATION_METHODS = {
   [DAST_SITE_VALIDATION_METHOD_TEXT_FILE]: {

ee/spec/frontend/security_configuration/dast_site_profiles_form/components/dast_site_validation_spec.js

@@ -222,7 +222,7 @@ describe('DastSiteValidation', () => {
 
       it('shows a code block containing the http-header key with the given token', () => {
         expect(
-          withinComponent().getByText(`Gitlab-On-Demand-DAST: uuid-code-${token}`, {
+          withinComponent().getByText(`Gitlab-On-Demand-DAST: ${token}`, {
             selector: 'code',
           }),
         ).not.toBe(null);
@@ -233,7 +233,7 @@ describe('DastSiteValidation', () => {
 
         expect(clipboardButton.exists()).toBe(true);
         expect(clipboardButton.props()).toMatchObject({
-          text: `Gitlab-On-Demand-DAST: uuid-code-${token}`,
+          text: `Gitlab-On-Demand-DAST: ${token}`,
           title: 'Copy HTTP header to clipboard',
         });
       });
@@ -282,7 +282,7 @@ describe('DastSiteValidation', () => {
           projectFullPath: fullPath,
           dastSiteTokenId: tokenId,
           validationPath: wrapper.vm.validationPath,
-          strategy: wrapper.vm.validationMethod,
+          validationStrategy: wrapper.vm.validationMethod,
         });
       });