Vault 11798 vault cli issue intermediate (#18467)

* The verify-sign command in it's cleanest existing form.

* Working state

* Updates to proper verification syntax

Co-authored-by: 'Alex Scheel' <alex.scheel@hashicorp.com>

* make fmt

* Git CI caught some stuff.

* Base functionality.

* make fmt; changelog

* pki issue command.

* Make fmt. Changelog.

* Error Handling Is Almost A Tutorial

* What I thought empty issuers response fix would be.

* Some tests

* PR-review updates.

* make fmt.

* Fix null response data for listing empty issuers causing a crash.

* Update command/pki_list_children_command.go

Fix double specifier

Co-authored-by: Steven Clark <steven.clark@hashicorp.com>

* Add test for pki_list_children.

* Fix tests.

* Update descriptions for correctness based on PR reviews.

* make fmt.

* Updates based on PR feedback.

* Allow multiple arguements (space separated)

* Remove bad merge-thing.

* White-space hell fix change.

* Tests, and return information for issue ca

* Fix make fmt error introduced here: https://github.com/hashicorp/vault/pull/18876

* Update command/pki_issue_intermediate.go

Puncutation.

Co-authored-by: Alexander Scheel <alex.scheel@hashicorp.com>

* Remove smart quotes for standard quotes.

* More information as part of the help text.

* Better help text.

* Add missing "/" into error message.

---------

Co-authored-by: 'Alex Scheel' <alex.scheel@hashicorp.com>
Co-authored-by: Steven Clark <steven.clark@hashicorp.com>

command/pki_list_intermediate_test.go

@@ -3,6 +3,8 @@ package command
 import (
 	"strings"
 	"testing"
+
+	"github.com/hashicorp/vault/api"
 )
 
 func TestPKIListIntermediate(t *testing.T) {
@@ -28,6 +30,10 @@ func TestPKIListIntermediate(t *testing.T) {
 	// RootX1 has issued IntX1; RootX3 has issued IntX2
 	createComplicatedIssuerSetUp(t, client)
 
+	runPkiListIntermediateTests(t, client)
+}
+
+func runPkiListIntermediateTests(t *testing.T, client *api.Client) {
 	cases := []struct {
 		name               string
 		args               []string