[EPIC] MQL: Support composite queries for metric formulas

[evanh]

Scoping: decide if we need to do these

Beta Give feedback

1. Handle tiered granularity in queries #5739
   +0
2. Fix inconsistent return values when there is no data #5740
   +0
3. Support ordering by tag columns in totals queries #5741
   +0
4. [EPIC] Support table style queries in the layer #5742
   +0

Parsing Step

Beta Give feedback

1. Update parser to support simple formulas with JOINs #6062
   +0
   
2. Support filters and bracket rules in parsing #6063
   +0
   
3. Support single expression formulas (unary, scalars) in parsing #6059
   +0
   
4. Support parsing groupby clause for composite queries #6060
   +0
   
5. Support curried aggregate and arbitrary multi-entity formula queries #6061
   +0
   

Subquery Generator

Beta Give feedback

1. Fix filter pushdown in subquery generator
2. Fix groupby resolution in subquery generator
3. FIx aliases in the ON clause during subquery generation
4. Aggregate FunctionCalls on SELECT clause should be properly pushed down