[Merged by Bors] - chore: adaptation for batteries#1500

[fgdorais]

After batteries#1500 is merged:

• Edit the lakefile to point to leanprover-community/batteries:main
• Run lake update batteries
• Merge leanprover-community/mathlib4:master
• Wait for CI and merge

[github-actions]

PR summary 3e37a71e20

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

---

Declarations diff

- getElem_idxOf

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.

---

No changes to technical debt.

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).

[bryangingechen]

Thanks!
bors r+

[mathlib-bors]

Pull request successfully merged into master.

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