[BUG]: Logger performance and level changes

[niden]

For the Logger class the levels are being recorded in upper case. For phalcon/phalcon using PSR we record them lower case.

• The levels need to change to record lower case to align with phalcon/phalcon
• There is a known performance hit for the Stream adapter which opens the stream every time it needs to write a message. It is best to open it once, write everything and then close it.

[niden]

Resolved in #16853