auth/gcp: add support for GCE regional instance groups (#16435)

* Update GCP auth to add support for regional instance groups

* Add changelog file

changelog/16435.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+auth/gcp: Add support for GCE regional instance groups
+```

go.mod

@@ -99,7 +99,7 @@ require (
 	github.com/hashicorp/vault-plugin-auth-azure v0.11.0
 	github.com/hashicorp/vault-plugin-auth-centrify v0.12.0
 	github.com/hashicorp/vault-plugin-auth-cf v0.12.0
-	github.com/hashicorp/vault-plugin-auth-gcp v0.7.1-0.20220630160554-54acedf4f4f6
+	github.com/hashicorp/vault-plugin-auth-gcp v0.13.2-0.20220722185016-9e4fddb995e5
 	github.com/hashicorp/vault-plugin-auth-jwt v0.7.2-0.20220627215329-c817ca9185c2
 	github.com/hashicorp/vault-plugin-auth-kerberos v0.7.0
 	github.com/hashicorp/vault-plugin-auth-kubernetes v0.13.0
@@ -123,7 +123,7 @@ require (
 	github.com/hashicorp/vault/api v1.7.2
 	github.com/hashicorp/vault/api/auth/approle v0.1.0
 	github.com/hashicorp/vault/api/auth/userpass v0.1.0
-	github.com/hashicorp/vault/sdk v0.5.1
+	github.com/hashicorp/vault/sdk v0.5.3
 	github.com/influxdata/influxdb1-client v0.0.0-20200827194710-b269163b24ab
 	github.com/jackc/pgx/v4 v4.15.0
 	github.com/jcmturner/gokrb5/v8 v8.4.2

go.sum

@@ -1024,8 +1024,8 @@ github.com/hashicorp/vault-plugin-auth-centrify v0.12.0 h1:d2dDZoUlSBNiw+jfi/2wx
 github.com/hashicorp/vault-plugin-auth-centrify v0.12.0/go.mod h1:3fDbIVdwA/hkOVhwktKHDX5lo4DqIUUVbBdwQNNvxHw=
 github.com/hashicorp/vault-plugin-auth-cf v0.12.0 h1:8X3Zlc6P/ih0MVhrPJ54iwiCyMVIcLwfBVpONuYddks=
 github.com/hashicorp/vault-plugin-auth-cf v0.12.0/go.mod h1:dr0cewrZ0SgpsPFkQ7Vf31J4xg+ylxM3Yv+dk1zWpEQ=
-github.com/hashicorp/vault-plugin-auth-gcp v0.7.1-0.20220630160554-54acedf4f4f6 h1:Z+nJ8c6rDlLAP+6S0U5pE0E8FY8FKrJrx3CsU6GdKNg=
-github.com/hashicorp/vault-plugin-auth-gcp v0.7.1-0.20220630160554-54acedf4f4f6/go.mod h1:4urKIVIzGNC8QKz/Iw1T00hIrHNswp9/5tkAwA8s60o=
+github.com/hashicorp/vault-plugin-auth-gcp v0.13.2-0.20220722185016-9e4fddb995e5 h1:uP0e9k8hIMfbWbeMKp6LxdRasxFBg4hTWaTmxDiwXZc=
+github.com/hashicorp/vault-plugin-auth-gcp v0.13.2-0.20220722185016-9e4fddb995e5/go.mod h1:WNwaZN7NWy14xcy3otm1OXp5blcKgblUfvE16eYeUoQ=
 github.com/hashicorp/vault-plugin-auth-jwt v0.7.2-0.20220627215329-c817ca9185c2 h1:f3kLhtR7PBUqGwlXVdPlixDTtMnnKZOTdWsE1cl2kUw=
 github.com/hashicorp/vault-plugin-auth-jwt v0.7.2-0.20220627215329-c817ca9185c2/go.mod h1:rb34Dyl/7t+ERmpyqqZaeLQUmMCKrbExrw7RxOLc9G8=
 github.com/hashicorp/vault-plugin-auth-kerberos v0.7.0 h1:6iQIiF4usqBwXZmab3rpq/dMIw+np+DFbIBxC3r6Ybw=