* Bump ruff from 0.0.206 to 0.0.215

Bumps [ruff](https://github.com/charliermarsh/ruff) from 0.0.206 to 0.0.215.
- [Release notes](https://github.com/charliermarsh/ruff/releases)
- [Changelog](https://github.com/charliermarsh/ruff/blob/main/BREAKING_CHANGES.md)
- [Commits](https://github.com/charliermarsh/ruff/compare/v0.0.206...v0.0.215

)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Changelog

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: GitHub Actions <github-actions[bot]@users.noreply.github.com>

ruff is a flake8-compatible Python linter written in Rust.
It supports the flake8 plugins that we use and is significantly
faster in testing.

PyYAML 3.13 fixes some issues with Python 3.7 compatibility
and was released in 2018.

Fixes #13655

This change uses ICU (International Components for Unicode) to improve boundary detection in user search.

This change also adds a new dependency on libicu-dev and pkg-config for the Debian packages, which are available in all supported distros.

The internal methods of the StreamChangeCache were inconsistently
treating the earliest known stream position as valid. It is now treated as
invalid, meaning the cache cannot determine if an entity at the earliest
known stream position has changed or not.	

This implements a fake OIDC server, which intercepts calls to the HTTP client.
Improves accuracy of tests by covering more internal methods.

One particular example was the ID token validation, which previously mocked.

This uncovered an incorrect dependency: Synapse actually requires at least
authlib 0.15.1, not 0.14.0.

* Don't pin dev-deps in pyproject; use lower bounds

This makes it slightly less tedious to update these things via
successive dependabot updates, by reducing the likelihood of a merge
conflict.

* Changelog

* Changelog

* Fix `track_memory_usage` on poetry-core 1.3.x installations

The same kind of problem as discussed in #14085:

1. we defined an extra with an underscore
2. we look it up at runtime with an underscore
3. but poetry-core 1.3.x. installs it with a dash, causing (2) to fail.

Fix by using a dash everywhere.

* Changelog

Signed-off-by: Ivan Shapovalov <intelfx@intelfx.name>

* Revert to prior build-system requirements

This reverts #14080.

* Use normalised extra name, which poetry-core 1.3 will generate anyway

* Changelog

* Upper bound build-system requirements

* Remove upgrade note; expand changelog entry a little.

* Fix typo in build-system comment

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Pin build-system requirements

* Changelog

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