Use params ReadOnlySpan<> feature

[SergeiPavlov]

Sometime it allows to avoid array allocation

[Copilot]

Pull Request Overview

This PR updates multiple API signatures to use the new ReadOnlySpan-based overloads in place of traditional arrays to help avoid unnecessary allocations. Key changes include updating identifier quoting methods, translation functions, key construction, and internal extractor methods across several modules to adopt the new language feature.

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Orm/Xtensive.Orm/Sql/SqlHelper.cs	Updated methods to accept ReadOnlySpan for identifier quoting.
Orm/Xtensive.Orm/Sql/Compiler/SqlTranslator.cs	Changed parameters to ReadOnlySpan in translation methods.
Orm/Xtensive.Orm/Sql/Compiler/Internals/PostCompiler.cs	Adopted new array literal syntax when quoting names.
Orm/Xtensive.Orm/Reflection/MethodHelper.cs	Replaced object[] parameters with ReadOnlySpan and removed redundant null checks.
Orm/Xtensive.Orm/Orm/QueryEndpoint.cs	Adjusted key retrieval calls to use the new syntax for ReadOnlySpan.
Orm/Xtensive.Orm/Orm/Linq/Translator.Materialization.cs	Updated method call parameters to use the new array literal syntax.
Orm/Xtensive.Orm/Orm/Key.cs	Modified key creation to accept ReadOnlySpan.
Orm/Xtensive.Orm/Orm/Internals/KeyFactory.cs	Updated signature to use ReadOnlySpan for key materialization.
Orm/Xtensive.Orm/Orm/Entity.cs	Changed entity constructors to use ReadOnlySpan in place of object[].
Orm/Xtensive.Orm.SqlServer/Sql.Drivers.SqlServer/v09/Extractor.cs	Modified usage of QuoteIdentifierWithBrackets to use new array literal.
Orm/Xtensive.Orm.PostgreSql/Sql.Drivers.PostgreSql/v8_0/Extractor.cs	Updated quoting of schema and database names to use new array literal syntax.