Unified Storage: Fix Create, Update and Delete wrt Resource Versions (#88183)

* add sqltemplate utilities, improve tests and documentation

* bunch of things

* remove unnecessary message

* add queries

* add queries

* add queries

* add folders support

* fix diff

* fix linters

* fix diff

* fix linters

* fix linters

* fix typo

* fix linters

* fix linters

* fix linters

* several fixes

* several fixes

* temporarily disable k8s integration tests for Entity Server

* postpone some tests

* postpone documentation changes

* Fix bug in create

* improve error reporting

* fix PostgeSQL parameters

* fix MySQL sqlmode

* fix MySQL-5.7

* reduce but document the number of database connection options

* remove unused code and improve docs

pkg/services/store/entity/sqlstash/sqltemplate/dialect_postgresql.go

@@ -8,6 +8,7 @@ import (
 // PostgreSQL is an implementation of Dialect for the PostgreSQL DMBS.
 var PostgreSQL = postgresql{
 	rowLockingClauseAll: true,
+	argPlaceholderFunc:  argFmtPositional,
 }
 
 var _ Dialect = PostgreSQL
@@ -20,6 +21,7 @@ var (
 type postgresql struct {
 	standardIdent
 	rowLockingClauseAll
+	argPlaceholderFunc
 }
 
 func (p postgresql) Ident(s string) (string, error) {