feat: user v2alpha email API (#5708)

* chore(proto): update versions

* change protoc plugin

* some cleanups

* define api for setting emails in new api

* implement user.SetEmail

* move SetEmail buisiness logic into command

* resuse newCryptoCode

* command: add ChangeEmail unit tests

Not complete, was not able to mock the generator.

* Revert "resuse newCryptoCode"

This reverts commit c89e90ae35.

* undo change to crypto code generators

* command: use a generator so we can test properly

* command: reorganise ChangeEmail

improve test coverage

* implement VerifyEmail

including unit tests

* add URL template tests

* proto: change context to object

* remove old auth option

* remove old auth option

* fix linting errors

run gci on modified files

* add permission checks and fix some errors

* comments

* comments

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>
Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>

internal/protoc/protoc-gen-auth/auth_method_mapping.go.tmpl

@@ -0,0 +1,16 @@
+// Code generated by protoc-gen-auth. DO NOT EDIT.
+
+package {{.GoPackageName}}
+
+import (
+	"github.com/zitadel/zitadel/internal/api/authz"
+)
+
+var {{.ServiceName}}_AuthMethods = authz.MethodMapping {
+    {{ range $m := .AuthOptions}}
+        {{$.ServiceName}}_{{$m.Name}}_FullMethodName: authz.Option{
+            Permission: "{{$m.Permission}}",
+            CheckParam: "{{$m.CheckFieldName}}",
+        },
+    {{ end}}
+}