Typos in strings, comments

[Blackweather]

Describe the bug

There are some typos in the strings, comments used in code.
The ones I found are:

• u;rl instead of url in line 286 of ./operator/gke.go
• mangers instead of managers in line 45 of ./operator/instance_group.go
• fucntion instead of function in line 41 of ./scheduler.go

There is also a typo in the CircleCI directory which should be named .circleci instead of .circleic.
Also the error not found project variable is not really correct grammatically and should be project variable not found instead.