[DEPS #4522, #4548] Add `uuidv4` template function to e2e sql templates

[pkong-ds]

Blocked by

• #4522
• #4568

~I realized we need to reuse the generated uuidv4 in db in reauth e2e tests.~

~Thus, this PR depends on https://linear.app/authgear/issue/DEV-1766/add-a-new-step-to-run-a-database-query-and-assert-the-result too.~

~Will mark this as draft first~

EDIT: updated

[pkong-ds]

@louischan-oursky this PR is not ready 🙏 As mentioned above, reauth needs generate_id_token with user_id, which is generated runtime.

The user_id requires https://linear.app/authgear/issue/DEV-1766/add-a-new-step-to-run-a-database-query-and-assert-the-result to fetch from db

[louischan-oursky]

You can now rebase.