{rdbms-connect} Update mycli to 1.26.1 and pgcli to 3.4.1

[alanenriqueo]

• When trying to connect to a mysql server using az mysql flexible-server connect --interactive, we get an error message saying module 'click' has no attribute 'get_terminal_size', this is fixed in mycli==1.26.1. This version change requires explicitely to set autocommit=true for executing queries.
• When trying to connect to a postgres server using az postgres flexible-server connect --interactive in Windows 32-bit we could get an error message saying ImportError: no pq wrapper available if we don't have library libpq.dll installed, that is because current pgcli==3.0.0 depends on pgspecial>=1.11.8 which in turns depends on psycopg 3, which is only compatible for 64-bit. So, we need to use specific version pgcli==3.4.1 which depends on exactly pgspecial=1.13.1 which in turn depends on psycopg2, and that is compatible for 32-bit also since it's older. az postgres flexible-server connect failing azure-cli#22889

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[yonzhan]

rdbms-connect

[azclibot]

[Release] Update index.json for extension [ rdbms-connect ] : https://dev.azure.com/azclitools/internal/_build/results?buildId=10641&view=results