chore(Analysis/Distribution): split off derivatives from SchwartzSpace and create new folder

[mcdoll]

Since Analysis/Distribution/SchwartzSpace.lean is over 1500 lines, we have to move some of its contents into a new file.
The derivatives are a natural choice, because it is quite a few lines of code, will see further expansion (with the Laplacian) and a number of imports are just needed for them.

We perform this split by moving the current file to Analysis/Distribution/SchwartzSpace/Basic.lean and creating a new file
Analysis/Distribution/SchwartzSpace.Deriv.lean. Moreover, we move the previous Analysis/Distribution/FourierSchwartz.lean to Analysis/Distribution/SchwartzSpace/Fourier.lean

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[github-actions]

PR summary ca7d6f198f

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference
Mathlib.Analysis.Distribution.FourierSchwartz	-2653
Mathlib.Analysis.Distribution.SchwartzSpace	-2558
24 files Mathlib.Analysis.Distribution.TemperedDistribution Mathlib.Analysis.Fourier.Convolution Mathlib.Analysis.Fourier.LpSpace Mathlib.Analysis.Fourier.PoissonSummation Mathlib.Analysis.SpecialFunctions.Gaussian.PoissonSummation Mathlib.NumberTheory.EulerProduct.DirichletLSeries Mathlib.NumberTheory.Harmonic.ZetaAsymp Mathlib.NumberTheory.LSeries.DirichletContinuation Mathlib.NumberTheory.LSeries.Dirichlet Mathlib.NumberTheory.LSeries.HurwitzZetaEven Mathlib.NumberTheory.LSeries.HurwitzZetaOdd Mathlib.NumberTheory.LSeries.HurwitzZetaValues Mathlib.NumberTheory.LSeries.HurwitzZeta Mathlib.NumberTheory.LSeries.Nonvanishing Mathlib.NumberTheory.LSeries.PrimesInAP Mathlib.NumberTheory.LSeries.RiemannZeta Mathlib.NumberTheory.LSeries.ZMod Mathlib.NumberTheory.ModularForms.EisensteinSeries.E2.Defs Mathlib.NumberTheory.ModularForms.EisensteinSeries.E2.Summable Mathlib.NumberTheory.ModularForms.EisensteinSeries.QExpansion Mathlib.NumberTheory.ModularForms.JacobiTheta.Bounds Mathlib.NumberTheory.ModularForms.JacobiTheta.Manifold Mathlib.NumberTheory.ModularForms.JacobiTheta.OneVariable Mathlib.NumberTheory.ModularForms.JacobiTheta.TwoVariable	1
Mathlib.Analysis.Distribution.SchwartzSpace.Basic	2533
Mathlib.Analysis.Distribution.SchwartzSpace.Deriv (new file)	2559
Mathlib.Analysis.Distribution.SchwartzSpace.Fourier	2654

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Declarations diff

No declarations were harmed in the making of this PR! 🐙

You can run this locally as follows

## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.

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Decrease in tech debt: (relative, absolute) = (1.00, 0.25)

Current number	Change	Type
4	-1	large files

Current commit f75143afb9
Reference commit ca7d6f198f

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

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note: file Mathlib/Analysis/Distribution/FourierSchwartz.lean` was renamed to `Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file Mathlib/Analysis/Distribution/SchwartzSpace.lean` was renamed to `Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

[mathlib4-merge-conflict-bot]

This pull request has conflicts, please merge master and resolve them.