Jobs are considered as not interruptible by default

What does this MR do?

The interruptible property is set to false by default in order to avoid disrupting change in 12.3.

Related issue

• gitlab-foss#32741 (moved)
• gitlab-foss#56508 (moved)
• gitlab-foss#63303 (moved)
• gitlab-foss#67299 (moved)
• Fixes #31776 (closed)
• #29527
• #26218
• #18246 (closed)

Related merge request

• gitlab-foss!23464 (merged)
• gitlab-foss!32949 (closed)
• !16715 (closed)
• !16716 (closed)
• !16786 (merged)

CC @ayufan