feat: Rewrite joins from SQL as query-level join hints

[mcheshkov]

Check List

• Tests have been run in packages where changes made if available
• Linter has been run for changed code
• Tests for the changes have been added if not covered yet
• Docs have been added / updated if required

Description of Changes Made (if issue reference is not provided)

This allows to keep join structure in some cases. Consider query like this:

SELECT cube2.dim, cube3.dim
FROM cube1
JOIN cube2 ON cube1.__cubeJoinField = cube2.__cubeJoinField
JOIN cube3 ON cube1.__cubeJoinField = cube3.__cubeJoinField
GROUP BY 1, 2

It references members only from cube2 and cube3, but join structure actually has cube1 as root, and it is completely missing from query.

Now every join will generate separate join hint during rewrite, and then they will get to JS side as a query-level join hints.

[codecov]

Codecov Report

Attention: Patch coverage is 95.74468% with 16 lines in your changes missing coverage. Please review.

Project coverage is 84.10%. Comparing base (801fbe5) to head (6943d50).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...sql/cubesql/src/compile/rewrite/rules/old_split.rs	0.00%	10 Missing ⚠️
...besql/cubesql/src/compile/rewrite/rules/members.rs	97.79%	5 Missing ⚠️
rust/cubesql/cubesql/src/compile/builder.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9561      +/-   ##
==========================================
+ Coverage   84.09%   84.10%   +0.01%     
==========================================
  Files         230      230              
  Lines       84395    84409      +14     
==========================================
+ Hits        70969    70991      +22     
+ Misses      13426    13418       -8     

Flag	Coverage Δ
cubesql	84.10% <95.74%> (+0.01%)	⬆️

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[igorlukanin]

Let's disallow to run "external" queries that contain join hints. Join hints should only be accepted for queries that have an "internal" origin, i.e., initiated by Cube as part of the SQL API processing. Consequently, a REST API query with join hints should always fail with a clear error message.

You can discuss this with @ovr.

[mcheshkov]

Let's disallow to run "external" queries that contain join hints. Join hints should only be accepted for queries that have an "internal" origin, i.e., initiated by Cube as part of the SQL API processing. Consequently, a REST API query with join hints should always fail with a clear error message.

You can discuss this with @ovr.

We discussed it with @paveltiunov, and decided that it’s ok to land it like this, and decide how to properly expose it in public API later