Add h1-case-adjust-bogus-server option

[kenichi-mashiyama]

Summary

This PR adds support for configuring the h1-case-adjust-bogus-server option within the defaults section of HAProxy configurations.

Motivation

By default, HAProxy normalizes HTTP header names to lowercase. While this complies with standard HTTP specifications, some legacy or non-compliant backend servers ("bogus servers") fail to process HTTP headers correctly if they are not in a specific case (e.g., CamelCase). The h1-case-adjust-bogus-server option in HAProxy provides a workaround for this issue. By introducing the h1CaseAdjustBogusServer field to the DefaultsConfiguration struct, users can now enable this option globally across all proxies directly via the Instance CRD.

Changes

• Added the H1CaseAdjustBogusServer (bool) field to the DefaultsConfiguration struct in apis/proxy/v1alpha1/instance_types.go.
• Updated the Model() method in apis/proxy/v1alpha1/instance_types.go to map this new field to the native HAProxy model (defaults.H1CaseAdjustBogusServer = models.DefaultsBaseH1CaseAdjustBogusServerEnabled).
• Added unit tests (TestDefaultsConfiguration_AddToParser_H1CaseAdjustBogusServerEnabled and TestDefaultsConfiguration_AddToParser_H1CaseAdjustBogusServerDisabledByDefault) in apis/proxy/v1alpha1/instance_types_test.go to verify the correct generation of the option h1-case-adjust-bogus-server configuration line.
• Regenerated CRDs and API documentation to reflect the new h1CaseAdjustBogusServer field.

Checklist

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

[xosk31]

Thank you very much for your contribution