[Merged by Bors] - refactor(MeasureTheory): golf Mathlib/MeasureTheory/Function/LpSeminorm/Basic

[yuanyi-350]

• reuses eLpNorm'_mono_enorm_ae to shorten eLpNorm'_mono_nnnorm_ae
• reuses eLpNorm_mono_enorm_ae to shorten eLpNorm_mono_nnnorm_ae
• rewrites eLpNorm_le_of_ae_nnnorm_bound as a direct simpa from eLpNorm_le_of_ae_enorm_bound

Extracted from #38104

[yuanyi-350]

!bench

[leanprover-radar]

Benchmark results for 20d6386 against e18244a are in. No significant results found. @yuanyi-350

• 🟥 build//instructions: +22.0G (+0.01%)

No significant changes detected.

[github-actions]

PR summary e18244a4f1

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

---

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/pr_summary/declarations_diff.sh <optional_commit>

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

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

---

No changes to technical debt.

This script lives in the mathlib-ci repository. To run it locally, from your mathlib4 directory:

git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci
../mathlib-ci/scripts/reporting/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).

[yuanyi-350]

I ran a profiler comparison for the changed declarations in this PR.

Results (seconds):

• eLpNorm'_mono_nnnorm_ae: 0.053128 -> 0.020422 (-61.6%)
• eLpNorm_mono_nnnorm_ae: 0.016148 -> 0.011026 (-31.7%)
• eLpNorm_le_of_ae_nnnorm_bound: 0.013916 -> 0.032377 (+132.7%)

Overall:

• eLpNorm'_mono_nnnorm_ae and eLpNorm_mono_nnnorm_ae are faster.
• eLpNorm_le_of_ae_nnnorm_bound regresses in elaboration time.

[RemyDegenne]

Thanks!
bors r+

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

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