Hello,

ATM it seems that the mysql instrumentation only support pymysql and mysql-connector-python, but for what I can see SQLAlchemy uses, by default mysqldb (aka mysqlclient)

Shouldn't mysqlclient be added so instrumentation works OOTB?

Note that SQLAlchemy explicitly says that mysql-connector-python is not supported:

    The MySQL Connector/Python DBAPI has had many issues since its release,
    some of which may remain unresolved, and the mysqlconnector dialect is
    **not tested as part of SQLAlchemy's continuous integration**.
    The recommended MySQL dialects are mysqlclient and PyMySQL.