Fix preferences serialization compatibility with Rails version check

This PR modifies the Persistable module in Solidus to check the Rails version using Rails.gem_version instead of inspecting the serialize method parameters. This change is necessary only when using Solidus Globalize, ensuring compatibility with Rails 7.2.

## Background
Solidus itself does not have any issues with the current implementation:

```
if method(:serialize).parameters.include?([:key, :type]) # Rails 7.1+
  serialize :preferences, type: Hash, coder: YAML
else
  serialize :preferences, Hash, coder: YAML
end
```

However, when using Solidus Globalize, which relies on globalize, an issue arises in Rails 7.2 due to globalize overriding the serialize method:

```
ArgumentError: wrong number of arguments (given 2, expected 1)
```

This occurs because the serialize method signature is modified by globalize, causing a mismatch when Solidus inspects its parameters.
For reference, see the globalize implementation here:
https://github.com/globalize/globalize/blob/main/lib/patches/active_record/rails7_2/serialization.rb

## Solution
To avoid conflicts, this PR replaces the method introspection with a Rails version check:
```
if Rails.gem_version >= Gem::Version.new('7.1')
  serialize :preferences, type: Hash, coder: YAML
else
  serialize :preferences, Hash, coder: YAML
end
```
This approach ensures compatibility while keeping Solidus independent from dependency-specific overrides.

This issue is currently blocking the CI of the following PR in the solidus_globalize repository:
solidusio-contrib/solidus_globalize#153
Fixing this in Solidus will help unblock that PR.

Author: swamp09

core/lib/spree/preferences/persistable.rb

@@ -8,7 +8,7 @@ module Persistable
       included do
         include Spree::Preferences::Preferable
 
-        if method(:serialize).parameters.include?([:key, :type]) # Rails 7.1+
+        if Rails.gem_version >= Gem::Version.new('7.1')
           serialize :preferences, type: Hash, coder: YAML
         else
           serialize :preferences, Hash, coder: YAML