Test Flake: TestMySQLMigrations

[ecordell]

--- FAIL: TestMySQLMigrations (60.72s)
    mysql.go:81: 
        	Error Trace:	/home/runner/work/spicedb/spicedb/internal/datastore/mysql/mysql.go:81
        	            				/home/runner/work/spicedb/spicedb/internal/datastore/mysql/datastore_test.go:629
        	            				/home/runner/work/spicedb/spicedb/internal/datastore/mysql/datastore_test.go:577
        	Error:      	Received unexpected error:
        	            	reached retry deadline
        	Test:       	TestMySQLMigrations

Seen here: https://github.com/authzed/spicedb/runs/8214010816?check_suite_focus=true