Upgrade grafana-plugin-model (#19438)

* use grafana-plugin-model dependency that uses go modules

* use grafana-plugin-model with updated hashicorp/go-plugin

* use grafana-plugin-model with re-compiled protos

* test using protoc-gen-go v1.2.0 tag

* use grafana-plugin-model with re-compiled protos

* chore: fix deprecation warning for lint

* use latest grafana-plugin-model

Fixes #19454

vendor/github.com/mattn/go-sqlite3/sqlite3_go18.go

@@ -10,7 +10,6 @@ package sqlite3
 
 import (
 	"database/sql/driver"
-	"errors"
 
 	"context"
 )
@@ -18,7 +17,8 @@ import (
 // Ping implement Pinger.
 func (c *SQLiteConn) Ping(ctx context.Context) error {
 	if c.db == nil {
-		return errors.New("Connection was closed")
+		// must be ErrBadConn for sql to close the database
+		return driver.ErrBadConn
 	}
 	return nil
 }