fix(api-gateway): Debug API, allow subscribe to pre-aggregations queue events only by playground JWT

[RusovDmitriy]

Check List

• Tests has 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

Issue Reference this PR resolves

Debug API, allow subscribe to pre-aggregations queue events only by playground JWT

[codecov]

Codecov Report

Merging #3144 (5ff6e36) into master (009156a) will decrease coverage by 21.28%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #3144       +/-   ##
===========================================
- Coverage   80.69%   59.41%   -21.29%     
===========================================
  Files          40      124       +84     
  Lines        3316     9518     +6202     
  Branches        0     2119     +2119     
===========================================
+ Hits         2676     5655     +2979     
- Misses        640     3577     +2937     
- Partials        0      286      +286     

Impacted Files	Coverage Δ
...s-schema-compiler/scaffolding/ScaffoldingSchema.js
...ckages/cubejs-schema-compiler/adapter/BaseQuery.js
...ejs-schema-compiler/compiler/DataSchemaCompiler.js
...es/cubejs-schema-compiler/compiler/CompileError.js
...s/cubejs-schema-compiler/compiler/CompilerCache.js
...s/cubejs-schema-compiler/compiler/CubeValidator.js
...es/cubejs-schema-compiler/extensions/Reflection.js
...ema-compiler/compiler/CubePropContextTranspiler.js
...es/cubejs-schema-compiler/adapter/BaseDimension.js
...kages/cubejs-schema-compiler/adapter/MssqlQuery.js
... and 154 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 46262b9...5ff6e36. Read the comment docs.