[WEB-1404] chore: auth ui / ux fixes (#4552)

* chore: update deactivated account alert message to show support email if available in env.

* chore: clear error_info on email check.

* chore: fix log-in / sign-up forms alignment and minor ux copy fix.

* fix: auth redirection to `/sign-in` issue.

* chore: update `back to sign in` url in forgot password screen.

web/pages/accounts/forgot-password.tsx

@@ -176,7 +176,7 @@ const ForgotPasswordPage: NextPageWithLayout = () => {
               >
                 {resendTimerCode > 0 ? `Resend in ${resendTimerCode} seconds` : "Send reset link"}
               </Button>
-              <Link href="/sign-in" className={cn("w-full", getButtonStyling("link-neutral", "lg"))}>
+              <Link href="/" className={cn("w-full", getButtonStyling("link-neutral", "lg"))}>
                 Back to sign in
               </Link>
             </form>