chore(deps): Bump tikv-jemallocator from 0.7.0

[JakubOnderka]

Summary

jemalloc is in active development again – https://engineering.fb.com/2026/03/02/data-infrastructure/investing-in-infrastructure-metas-renewed-commitment-to-jemalloc/. This pull request updates tikv-jemallocator from version 0.6 to version 0.7, thats include jemalloc 5.3.1, new version released after 3 years:

This release includes over 390 commits spanning bug fixes, new features,
performance optimizations, and portability improvements. Multiple percent
of system-level metric improvements were measured in tested production
workloads. The release has gone through large-scale production testing
at Meta.

How did you test this PR?

cargo test

Change Type

• Bug fix
• New feature
• Dependencies
• Non-functional (chore, refactoring, docs)
• Performance

Is this a breaking change?

• Yes
• No

Does this PR include user facing changes?

• Yes. Please add a changelog fragment based on our guidelines.
• No. A maintainer will apply the no-changelog label to this PR.

[pront]

Thanks!

[pront]

For future reference: jemalloc/jemalloc#2884