fix: conformance - state.mysql.mysql

[mikeee]

Description

Applies the same update as #3450, this time to the docker manifest used for component conformance test.

There are no more instances of the deprecated flag --default-authentication-plugin existing in this repo.

Issue reference

Does not close but arose from/is tracked by #3457

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation / Created issue in the https://github.com/dapr/docs/ repo: dapr/docs#[issue number]