Bump trillian-opensource-ci/db_server from `97d822e` to `128cd27` in /config/trillian/mysql #1573

Job	Run time
Test github action with TUF (v1.27.x, main, 1.23.x, test github action with TUF)	4m 35s
Test github action with TUF (v1.28.x, main, 1.23.x, test github action with TUF)	4m 36s
Test github action with TUF (v1.29.x, main, 1.23.x, test github action with TUF)	4m 33s
Test github action with TUF (v1.30.x, main, 1.23.x, test github action with TUF)	4m 34s
	18m 18s

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