Migrate the existing Envoy filters (OAuth2 and Token Header) from the GATEWAY to the SIDECAR.

Reasons:

• The GATEWAY primarily focuses on routing and load balancing, while the SIDECAR is responsible for handling service-specific concerns.
• SIDECAR deployment allows for more granular scaling of individual services.
• Decoupling enables easier migration and deployment of services across different environments or infrastructure setups. It also allows for service-specific configuration adjustments without affecting the GATEWAY.