fix(gdb/mysql): always URL-encode timezone value in DSN to prevent '+' from being interpreted as space (#4759) [fj4WqyCCw3C5ShR1RfB7MoBPTpkRrBFYP1uT35g3MvT]

fix(gdb/mysql): always URL-encode timezone value in DSN to prevent '+' from being interpreted as space (#4759) [fj4WqyCCw3C5ShR1RfB7MoBPTpkRrBFYP1uT35g3MvT] #1662