chore: move a few test files about tactics into MathlibTest/Tactic

[joneugster]

Continuation of previous PRs, moves a more test files about tactics into the folder MathlibTest/Tactic/. Does not touch content but capitalises some file names which weren't uppercase already.

• depends on: [Merged by Bors] - chore: move tests about tactics into folder and capitalise #39674
• depends on: [Merged by Bors] - chore: move test files and recapitalise file names (part 2) #39681
• depends on: [Merged by Bors] - chore: move test files and recapitalise file names (part 3) #39682
• depends on: [Merged by Bors] - chore: move test files and capitalise file names (part 4) #39683

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[github-actions]

PR summary f935452b37

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

---

Declarations diff (regex)

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

You can run this locally as follows

## from your `mathlib4` directory:
git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci

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

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

The doc-module for scripts/pr_summary/declarations_diff.sh in the mathlib-ci repository contains some details about this script.

Declarations diff (Lean)

✅ Lean-aware diff — post-build, computed from the Lean environment (commit f935452).

• +0 new declarations
• −0 removed declarations

No declaration differences.

---

No changes to strong technical debt.

No changes to weak technical debt.

Current commit f935452b37
Reference commit 4ac22c7efc

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).

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note: file MathlibTest/peel.lean` was renamed to `MathlibTest/Tactic/Peel.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/basicTactics.lean` was renamed to `MathlibTest/Tactic/BasicTactics.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/Continuity.lean` was renamed to `MathlibTest/Tactic/Continuity.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/Assume.lean` was renamed to `MathlibTest/Tactic/Assume.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/borelize.lean` was renamed to `MathlibTest/Tactic/Borelize.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/SimpRw.lean` was renamed to `MathlibTest/Tactic/SimpRw.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/positivity.lean` was renamed to `MathlibTest/Tactic/Positivity.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/SplitIfs.lean` was renamed to `MathlibTest/Tactic/SplitIfs.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/Set.lean` was renamed to `MathlibTest/Tactic/Set.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/Clean.lean` was renamed to `MathlibTest/Tactic/Clean.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/byContra.lean` was renamed to `MathlibTest/Tactic/ByContra.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

note: file MathlibTest/NormCast.lean` was renamed to `MathlibTest/Tactic/NormCast.lean without a module deprecation
Please create a follow-up pull request adding one. Thanks!

[mathlib-dependent-issues]

This PR/issue depends on:

• [Merged by Bors] - chore: move tests about tactics into folder and capitalise #39674
• [Merged by Bors] - chore: move test files and recapitalise file names (part 2) #39681
• [Merged by Bors] - chore: move test files and recapitalise file names (part 3) #39682
• [Merged by Bors] - chore: move test files and capitalise file names (part 4) #39683
  By Dependent Issues (🤖). Happy coding!

[grunweg]

Thanks!
bors merge

[mathlib-bors]

Timed out.

Fix if necessary, and then someone with permission can run bors r+ or bors retry.