chore!: allow coder MCP tools to not be injected (#20713)

Currently, when AI Bridge is enabled AND the `oauth2` and
`mcp-server-http` experiments are enabled we inject Coder's MCP tools
into all intercepted AI Bridge requests.

This PR introduces a config to control this behaviour.

**NOTE:** this is a backwards-incompatible change; previously these
tools would be injected automatically, now this setting will need to be
explicitly enabled.

---------

Signed-off-by: Danny Kopping <danny@coder.com>

enterprise/coderd/aibridged.go

@@ -49,7 +49,7 @@ func (api *API) CreateInMemoryAIBridgeServer(dialCtx context.Context) (client ai
 
 	mux := drpcmux.New()
 	srv, err := aibridgedserver.NewServer(api.ctx, api.Database, api.Logger.Named("aibridgedserver"),
-		api.AccessURL.String(), api.ExternalAuthConfigs, api.AGPL.Experiments)
+		api.AccessURL.String(), api.DeploymentValues.AI.BridgeConfig, api.ExternalAuthConfigs, api.AGPL.Experiments)
 	if err != nil {
 		return nil, err
 	}