Disable `SecurityFilterChain` for `@GrpcService` by default

I'm facing problems with disabling `SecurityFilterChain` for the gRPC service.
I wanted to integrate gRPC service into the existing Spring Web server project, but it failed to start due to the following:
` Found WebSecurityConfigurerAdapter as well as SecurityFilterChain. Please select just one.`

The project I'm trying to integrate with contains `WebSecurityConfigurerAdapter` already. We use it for authentications.
I tried to disable `spring-security` in the `grpc-spring-boot-starter` like this but unsuccessfully:

```

net.devh
grpc-spring-boot-starter
2.13.1.RELEASE


org.springframework.security
spring-security-web


org.springframework.security
spring-security-config

```

The server is executed as `grpc-netty-shaded`.

I don't understand why your starter insists on initializing the filter chain and there is no way to disable it?
Is there any way to disable security for grpc starter?

### Project dependencies
Spring Boot Starter Parent: 2.6.7
gRPC Spring Boot Starter: 2.13.1.RELEASE
io.grpc: 1.50.2
Google Protobuf: 3.21.8

Start by tracing the starter's security auto-configuration and how it applies to @GrpcService, using the reported Spring Boot 2.6.7 and grpc-spring-boot-starter 2.13.1.RELEASE setup as a reproduction. Identify the configuration point that creates the SecurityFilterChain and verify that an application can disable it while retaining its existing WebSecurityConfigurerAdapter.

Written by the indexing model from the issue text.