CSCwe67174: Add common security response headers

CSCwe67174: Add common security response headers

go mod and vendor fixes

Fix ctxSetSession signature for sitekey change

Fixes: upgrading to tyk 3.0.12 from 3.0.0

Fixes: upgrading to tyk 3.0.13 from 3.0.0

Fix ctxSetSession signature for sitekey change

CSCwd21346: Rename tyk.io header

Merge branch 'tyk3-10012020' into tyk4-03062023

- Conflicts:
-	apidef/api_definitions.go
-	config/config.go
-	gateway/api.go
-	gateway/api_definition.go
-	gateway/handler_error.go
-	gateway/handler_success.go
-	gateway/host_checker_manager.go
-	gateway/mw_jwt.go
-	gateway/mw_track_endpoints.go
-	gateway/reverse_proxy.go
-	gateway/server.go
-	go.mod
-	go.sum
-	vendor/github.com/dgrijalva/jwt-go/rsa_utils.go
-	vendor/github.com/hashicorp/go-cleanhttp/go.mod
-	vendor/github.com/hashicorp/go-retryablehttp/go.mod

TEST-TYK code