Update dependency mysql-connector-python to ^9.3.0 (#427)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
|
[mysql-connector-python](https://redirect.github.com/mysql/mysql-connector-python)
([changelog](https://dev.mysql.com/doc/relnotes/connector-python/en/)) |
`^9.2.0` -> `^9.3.0` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/mysql-connector-python/9.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/mysql-connector-python/9.2.0/9.3.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>mysql/mysql-connector-python (mysql-connector-python)</summary>

###
[`v9.3.0`](https://redirect.github.com/mysql/mysql-connector-python/blob/HEAD/CHANGES.txt#v930)

[Compare
Source](https://redirect.github.com/mysql/mysql-connector-python/compare/9.2.0...9.3.0)

\======

-
[WL#16754](https://redirect.github.com/WL/mysql-connector-python/issues/16754):
The host wildcard no longer applies to localhost
-
[WL#16752](https://redirect.github.com/WL/mysql-connector-python/issues/16752):
Deprecate class methods to access instance data or to know instance
internal state
-
[WL#16327](https://redirect.github.com/WL/mysql-connector-python/issues/16327):
Remove Cursors Prepared Raw and Named Tuple
-
[BUG#37541353](https://redirect.github.com/BUG/mysql-connector-python/issues/37541353):
(Contribution) Fix typing annotation of MySQLConnectionAbstract's close
function
-
[BUG#37453587](https://redirect.github.com/BUG/mysql-connector-python/issues/37453587):
Github links in PyPI project's pages do not work
-
[BUG#37447394](https://redirect.github.com/BUG/mysql-connector-python/issues/37447394):
Unable to escape a parameter marker (`%s`) used in a query that should
not be treated as a parameter marker
-
[BUG#37418436](https://redirect.github.com/BUG/mysql-connector-python/issues/37418436):
Arbitrary File Read in MySQL Python Client library
-
[BUG#37410052](https://redirect.github.com/BUG/mysql-connector-python/issues/37410052):
Bad formatting of exceptions when connecting with Unix sockets
-
[BUG#37399636](https://redirect.github.com/BUG/mysql-connector-python/issues/37399636):
The C-extension has a memory leak when working with prepared statements
-
[BUG#37275524](https://redirect.github.com/BUG/mysql-connector-python/issues/37275524):
Exception is not interpreted properly on prepared statements when C
extension is in use
-
[BUG#36098290](https://redirect.github.com/BUG/mysql-connector-python/issues/36098290):
mysql-connector-python is distributed without setup.py or pyproject.toml

</details>

---

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poetry.lock

@@ -53,7 +53,7 @@ ops = "^2.9.0"
 pytest = "^8.2.2"
 pytest-operator = "^0.35.0"
 juju = "^3.6.0.0"
-mysql-connector-python = "^9.2.0"
+mysql-connector-python = "^9.3.0"
 pyyaml = "^6.0.1"
 tenacity = "^8.5.0"
 allure-pytest = "^2.13.5"