Update vault-plugin-auth-gcp to v0.19.0 (#28366)

* Update vault-plugin-auth-gcp to v0.19.0

* Add changelog

changelog/28366.txt

@@ -0,0 +1,3 @@
+```release-note:change
+auth/gcp: Update plugin to v0.19.0
+```

go.mod

@@ -130,7 +130,7 @@ require (
 	github.com/hashicorp/vault-plugin-auth-alicloud v0.19.0
 	github.com/hashicorp/vault-plugin-auth-azure v0.19.0
 	github.com/hashicorp/vault-plugin-auth-cf v0.19.0
-	github.com/hashicorp/vault-plugin-auth-gcp v0.18.0
+	github.com/hashicorp/vault-plugin-auth-gcp v0.19.0
 	github.com/hashicorp/vault-plugin-auth-jwt v0.22.0
 	github.com/hashicorp/vault-plugin-auth-kerberos v0.13.0
 	github.com/hashicorp/vault-plugin-auth-kubernetes v0.19.0

go.sum

@@ -1553,8 +1553,8 @@ github.com/hashicorp/vault-plugin-auth-azure v0.19.0 h1:TdInvToRpn0tCl/+R4qqAAov
 github.com/hashicorp/vault-plugin-auth-azure v0.19.0/go.mod h1:elSxwfldjnRJQsJIAfD305g7gvUnFDykGvuY5phNNgw=
 github.com/hashicorp/vault-plugin-auth-cf v0.19.0 h1:/I084ZCypbhTO5ZiYjxhjzokuDqOWWLLxHatyViU9ss=
 github.com/hashicorp/vault-plugin-auth-cf v0.19.0/go.mod h1:LiH/IttNxAgto2ooR9l2g6+CiXc5c/1uPE0pT0hILRg=
-github.com/hashicorp/vault-plugin-auth-gcp v0.18.0 h1:chiaa1NLN/B2fcoN/WY/YWVxB8F+hE5koudzLWQcG2c=
-github.com/hashicorp/vault-plugin-auth-gcp v0.18.0/go.mod h1:HtXlc4HKAmUe8/WE4hP0dirpkq4joxhvm8EZ/TvOZk0=
+github.com/hashicorp/vault-plugin-auth-gcp v0.19.0 h1:mMTnAGDi6GigGmP9DlLjDzp5VRF8/sZzw8hlfOLFbbU=
+github.com/hashicorp/vault-plugin-auth-gcp v0.19.0/go.mod h1:+0+ufeudu8nKVS448iHnzKp5SgLtMcs2U9E0nOUoL/Q=
 github.com/hashicorp/vault-plugin-auth-jwt v0.22.0 h1:ihjx6HszRSt8Vfknc5t0AKXBQqFhqTQ4Wdd/PK+EboU=
 github.com/hashicorp/vault-plugin-auth-jwt v0.22.0/go.mod h1:+Ne5sCgAza7aDIzxE4aruv6PeQI9ORWIvg/dFe2jlJU=
 github.com/hashicorp/vault-plugin-auth-kerberos v0.13.0 h1:KN+nY7XJANb7IRILf0EnaCT04JI9ctiUhq/W9sgyJnk=