schema: Migrate from scuemata to thema (#49805)

* Remove crufty scuemata bits

Buhbye to: cue/ dir with old definitions, CI steps for checking unnecessary
things, and the original dashboard scuemata file.

* Remove grafana-cli cue subcommand

* Remove old testdata

* Don't swallow errors from codegen

* Small nits and tweaks to cuectx package

* WIP - refactor pluggen to use Thema

Also consolidate the embed.FS in the repo root.

* Finish halfway rename

* Convert all panel models.cue to thema

* Rewrite pluggen to use Thema

* Remove pkg/schema, and trim command

* Remove schemaloader service and usages

Will be replaced by coremodel-centric hydrate/dehydrate system Soon™.

* Remove schemaloader from wire

* Remove hangover field on histogram models.cue

* Fix lint errors, some vestiges of trim service

* Remove unused cuetsify cli command

public/app/plugins/panel/table/models.cue

@@ -15,22 +15,25 @@
 package grafanaschema
 
 import (
-    ui "github.com/grafana/grafana/packages/grafana-schema/src/schema"
+	"github.com/grafana/thema"
+	ui "github.com/grafana/grafana/packages/grafana-schema/src/schema"
 )
 
-Panel: {
-    lineages: [
-        [
-            {
-                PanelOptions: {
-                    frameIndex: number | *0
-                    showHeader: bool | *true
-                    showTypeIcons: bool | *false
-                    sortBy?: [...ui.TableSortByFieldState]
-                } @cuetsy(kind="interface")
-                PanelFieldConfig: ui.TableFieldOptions & {} @cuetsy(kind="interface")
-            },
-        ]
-    ]
-    migrations: []
+Panel: thema.#Lineage & {
+	name: "table"
+	seqs: [
+		{
+			schemas: [
+				{
+					PanelOptions: {
+						frameIndex:    number | *0
+						showHeader:    bool | *true
+						showTypeIcons: bool | *false
+						sortBy?: [...ui.TableSortByFieldState]
+					} @cuetsy(kind="interface")
+					PanelFieldConfig: ui.TableFieldOptions & {} @cuetsy(kind="interface")
+				},
+			]
+		},
+	]
 }