Add h1-case-adjust-bogus-server option

[kenichi-mashiyama]

Summary

This PR adds support for the option h1-case-adjust-bogus-server directive in the defaults section of the HAProxy configuration.

Motivation

Currently, there is no way to configure h1-case-adjust-bogus-server in the defaults section through the HAProxy Operator CRDs. This option is necessary for environments dealing with legacy or non-compliant backend servers that require strict HTTP/1.1 header casing (e.g., expecting Content-Type instead of content-type). By adding this boolean field, users can now easily enable this feature globally via the DefaultsConfiguration.

Changes

• Added the H1CaseAdjustBogusServer boolean field to the DefaultsConfiguration struct in apis/proxy/v1alpha1/instance_types.go.
• Updated the Model() method for the defaults configuration to map this new field to the native HAProxy model (models.DefaultsBaseH1CaseAdjustBogusServerEnabled).
• Added unit tests in apis/proxy/v1alpha1/instance_types_test.go to verify the correct generation of the option h1-case-adjust-bogus-server directive when enabled, and its absence when disabled.
• Regenerated CRDs and API documentation to reflect the schema updates.

Checklist

• Code changes implemented
• Unit tests added/updated
• Generated CRDs and API docs updated