fix(sveltekit): Wrap load when typed explicitly (#8049)

When `load` is explicitly typed (using `export const load: LayoutLoad = ...`), auto-instrumentation failed. This patch extends the regex to handle this case and adds a test for it.

Author: sreetamdas

packages/sveltekit/src/vite/autoInstrument.ts

@@ -98,7 +98,9 @@ export async function canWrapLoad(id: string, debug: boolean): Promise<boolean>
     debug && console.log(`Skipping wrapping ${id} because it already contains Sentry code`);
   }
 
-  const hasLoadDeclaration = /((const|let|var|function)\s+load\s*(=|\())|as\s+load\s*(,|})/gm.test(codeWithoutComments);
+  const hasLoadDeclaration = /((const|let|var|function)\s+load\s*(=|\(|:))|as\s+load\s*(,|})/gm.test(
+    codeWithoutComments,
+  );
   if (!hasLoadDeclaration) {
     // eslint-disable-next-line no-console
     debug && console.log(`Skipping wrapping ${id} because it doesn't declare a \`load\` function`);

packages/sveltekit/test/vite/autoInstrument.test.ts

@@ -176,6 +176,12 @@ describe('canWrapLoad', () => {
        async function somethingElse(){};
        export { somethingElse as  load, foo }`,
     ],
+
+    [
+      'export variable declaration - inline function with assigned type',
+      `import type { LayoutLoad } from './$types';
+       export const load :  LayoutLoad = async () => { return { props: { msg: "hi" } } }`,
+    ],
   ])('returns `true` if a load declaration  (%s) exists and no Sentry code was found', async (_, code) => {
     fileContent = code;
     expect(await canWrapLoad('+page.ts', false)).toEqual(true);