Channel banner sql migrations (#30274)

* Adde MySQL and Postgres migrations

* Replaced select * with column names

* removed all * from channel SQL store

* cleanup

* Fixed a duplicate column

* cleanup

* Added migrations and store support

* WIP

* used channelname slice in a missed place

* Handled patch

* Added app level tests

* Added API layer tests

* Added API layer tests

* WIP

* converted to query builder

* cleanupo

* added not null and default constraints

* Fixed test

* fixed file name

* review fixes

* review fixes

* updated migration file

* fixed text

* Review fixes

server/i18n/en.json

@@ -515,6 +515,10 @@
     "id": "api.channel.restore_channel.unarchived",
     "translation": "{{.Username}} unarchived the channel."
   },
+  {
+    "id": "api.channel.update_channel.banner_info.channel_type.not_allowed",
+    "translation": "Channel banner can only be configured on Public and Private channels."
+  },
   {
     "id": "api.channel.update_channel.deleted.app_error",
     "translation": "The channel has been archived or deleted."
@@ -8492,6 +8496,22 @@
     "id": "model.channel.is_valid.1_or_more.app_error",
     "translation": "Name must be 1 or more lowercase alphanumeric character."
   },
+  {
+    "id": "model.channel.is_valid.banner_info.background_color.empty.app_error",
+    "translation": "Channel banner color cannot be empty when channel banner is enabled"
+  },
+  {
+    "id": "model.channel.is_valid.banner_info.channel_type.app_error",
+    "translation": "Channel banner can only be configured on Public and Private channels"
+  },
+  {
+    "id": "model.channel.is_valid.banner_info.text.empty.app_error",
+    "translation": "Channel banner info text cannot be empty when channel banner is enabled"
+  },
+  {
+    "id": "model.channel.is_valid.banner_info.text.invalid_length.app_error",
+    "translation": "Channel banner info text is too long. Max allowed length is {{.maxLength}} characters."
+  },
   {
     "id": "model.channel.is_valid.create_at.app_error",
     "translation": "Create at must be a valid time."