[8pt] Translate SQL reference

[patiencedaur]

Info

Page: https://www.tarantool.io/ru/doc/latest/reference/reference_sql/
Crowdin: TBA
Words: about 10,000
Reviewer: TBA

Only a couple of small sections of this reference have been translated. (see #2350)

• What Tarantool’s SQL product delivers
• Beginners' guide
• User guide
• Statements and clauses
• SQL plus Lua
• SQL features (Translate SQL features #2537)

[patiencedaur]

This issue is not a bug fix request, it was created solely for translation purposes. Now that Russian translations are frozen, this issue has become irrelevant. Closed.