Move aggregate functions to source code

[Blargian]

Move the following functions into the source code and generate these pages from system tables:

https://clickhouse.com/docs/sql-reference/aggregate-functions/reference

Here's the complete list of ClickHouse aggregate functions as a single list:

• aggThrow
• analysisOfVariance
• any
• anyHeavy
• anyLast
• approx_top_k
• approx_top_sum
• argMax
• argMin
• avg
• groupArray
• groupArrayArray
• groupArrayLast
• groupArraySample
• groupArraySorted

ClickHouse/ClickHouse#87106 -> PR with modifications to allow AggregateFunctions docs

• avgWeighted
• boundingRatio
• categoricalInformationValue
• contingency
• corr
• corrMatrix
• corrStable
• count
• covarPop
• covarPopMatrix
• covarPopStable
• covarSamp
• covarSampMatrix
• covarSampStable
• cramersV
• cramersVBiasCorrected
• deltaSum
• deltaSumTimestamp
• distinctDynamicTypes
• distinctJSONPaths
• entropy
• estimateCompressionRatio
• exponentialMovingAverage
• exponentialTimeDecayedAvg
• exponentialTimeDecayedCount
• exponentialTimeDecayedMax
• exponentialTimeDecayedSum
• first_value -> this is actually an alias ?
• flameGraph
• groupArrayInsertAt
• groupArrayIntersect
• groupArrayMovingAvg
• groupArrayMovingSum
• groupArraySorted
• timeSeriesGroupArray
• groupBitAnd
• groupBitmap
• groupBitmapAnd
• groupBitmapOr
• groupBitmapXor
• groupBitOr
• groupBitXor
• groupConcat
• groupUniqArray
• intervalLengthSum
• kolmogorovSmirnovTest
• kurtPop
• kurtSamp
• largestTriangleThreeBuckets
• last_value
• mannWhitneyUTest
• max
• maxIntersections
• maxIntersectionsPosition
• maxMap
• meanZTest
• median
• min
• minMap
• quantile
• quantileBFloat16
• quantileDD
• quantileDeterministic
• quantileExact
• quantileExactWeighted
• quantileGK
• quantileExactWeightedInterpolated
• quantileInterpolatedWeighted
• quantiles
• quantileTDigest
• quantileTDigestWeighted
• quantileTiming
• quantileTimingWeighted
• rankCorr
• simpleLinearRegression
• singleValueOrNull
• skewPop
• skewSamp
• sparkbar
• stddevPop
• stddevPopStable
• stddevSamp
• stddevSampStable
• stochasticLinearRegression
• stochasticLogisticRegression
• studentTTest
• sum
• sumCount
• sumKahan
• sumMap
• sumMapWithOverflow
• sumWithOverflow
• theilsU
• timeSeriesDeltaToGrid
• timeSeriesInstantDeltaToGrid
• timeSeriesInstantRateToGrid
• timeSeriesLastTwoSamples
• timeSeriesRateToGrid
• timeSeriesResampleToGridWithStaleness
• timeSeriesDerivToGrid
• timeSeriesPredictLinearToGrid
• topK
• topKWeighted
• uniq
• uniqCombined
• uniqCombined64
• uniqExact
• uniqHLL12
• uniqTheta
• varPop
• varPopStable
• varSamp
• varSampStable
• welchTTest
• distinctDynamicTypes
• distinctJSONPaths
• timeSeriesDeltaToGrid
• timeSeriesInstantDeltaToGrid
• timeSeriesInstantRateToGrid
• timeSeriesLastTwoSamples
• timeSeriesRateToGrid
• timeSeriesResampleToGridWithStaleness
• timeSeriesDerivToGrid
• timeSeriesPredictLinearToGrid
• timeSeriesChangesToGrid
• timeSeriesResetsToGrid
• groupConcat