Bug Description

When building Fiber for non-amd64/arm64 architectures (e.g., s390x, ppc64, ppc64le), the change introduced in PR #3703 causes runtime crashes due to alignment faults.

At runtime, Fiber panics with errors such as:

github.com/gofiber/fiber/v3.(*App).GetString: runtime.erodata+41911353 is not 2-byte aligned
github.com/gofiber/fiber/v3.(*App).GetBytes: runtime.erodata+41911353 is not 2-byte aligned
github.com/gofiber/fiber/v3.(*DefaultReq).Body: runtime.erodata+41911353 is not 2-byte aligned
github.com/gofiber/fiber/v3.(*DefaultReq).Params: runtime.erodata+41911353 is not 2-byte aligned
github.com/gofiber/fiber/v3.(*DefaultReq).getBody: runtime.erodata+41911353 is not 2-byte aligned

How to Reproduce

Steps to reproduce the behavior:

1. Create a minimal Fiber app:

package main

import "github.com/gofiber/fiber/v3"

func main() {
    app := fiber.New()

    // Route that uses Params
    app.Get("/user/:id", func(c fiber.Ctx) error {
        // This will hit DefaultReq.Params internally
        return c.SendString("ID = " + c.Params("id"))
    })

    // Route that uses Body
    app.Post("/echo", func(c fiber.Ctx) error {
        // This will hit DefaultReq.Body internally
        return c.Send(c.Body())
    })

    app.Listen(":3000")
}

2. Cross-compile the app for s390x:

   GOARCH=s390x GOOS=linux go build -o app .

3. Observed behavior:
   The build fails with alignment errors similar to:

   github.com/gofiber/fiber/v3.(*DefaultReq).Body: runtime.erodata+6358137 is not 2-byte aligned
   github.com/gofiber/fiber/v3.(*DefaultReq).Params: runtime.erodata+6358137 is not 2-byte aligned
   github.com/gofiber/fiber/v3.(*DefaultReq).getBody: runtime.erodata+6358137 is not 2-byte aligned
   

Expected behavior:
The build should succeed and produce a binary.

Actual behavior:
The build fails immediately due to unsafe .rodata checks that are not valid on strict-alignment architectures (s390x, ppc64, etc.).

Expected Behavior

The build should succeed and produce a binary.

Fiber Version

v3.0.0-rc.2

Code Snippet (optional)

package main

import "github.com/gofiber/fiber/v3"

func main() {
    app := fiber.New()

    // Route that uses Params
    app.Get("/user/:id", func(c fiber.Ctx) error {
        // This will hit DefaultReq.Params internally
        return c.SendString("ID = " + c.Params("id"))
    })

    // Route that uses Body
    app.Post("/echo", func(c fiber.Ctx) error {
        // This will hit DefaultReq.Body internally
        return c.Send(c.Body())
    })

    app.Listen(":3000")
}

Checklist:

• I agree to follow Fiber's Code of Conduct.
• I have checked for existing issues that describe my problem prior to opening this one.
• I understand that improperly formatted bug reports may be closed without explanation.