Add life property to Tooltip

[saximoer3]

I'm submitting a ... (check one with "x")

[ ] bug report => Search github for a similar issue or PR before submitting
[ ] feature request => Please check if request is not on the roadmap already https://github.com/primefaces/primeng/wiki/Roadmap
[ ] support request => Please do not submit support request here, instead see http://forum.primefaces.org/viewforum.php?f=35

Expected behavior
i need a property to hide the tooltip in milliseconds by setTimeout.
i think some people need it too.

like this:
@input() life: number;

ngAfterViewInit(): void {
if( this.life ){
setTimeout(() => { this.deactivate() }, this.life);
}
}

[aervin]

Same as my feature request in #3516. Here is a PR w/ very basic implementation: #3539