MM-62558 Add E2E tests for custom profile settings (#30722)

* add e2e tests for custom profile settings

* fix failed tests

* reorg folder and file convention, and add more details of the tests

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Co-authored-by: Mattermost Build <build@mattermost.com>

server/public/model/custom_profile_attributes.go

@@ -119,7 +119,7 @@ func (c CustomProfileAttributesSelectOption) IsValid() error {
 
 type CPAField struct {
 	PropertyField
-	Attrs CPAAttrs
+	Attrs CPAAttrs `json:"attrs"`
 }
 
 type CPAAttrs struct {