feat: Add ignore path to autodiscover using glob

[lukemassa]

what

Add ability to ignore paths in auto-discovery using filepath "glob" matching.

An alternative to #5254, which uses regexes instead of globs.

why

It's useful to allow certain directories to be auto discovered, but leave other areas of a repo for explicit configuration.

To the regex vs glob question, the glob implementation feels a little easier to read and work with. We can always additionally support regexes by surrounding them with / (I have this currently error in the code so we can make this backwards compatible change in the future).

Also, I looked at a few other vendors: the first two support globs, the third doesn't support this kind of configuration at all, so it felt like globs was a better way to go.

https://docs.spacelift.io/concepts/stack/stack-settings#project-globs
https://docs.env0.com/docs/environment-discovery#configure-the-environment-mapping
https://docs.terrateam.io/advanced-workflows/modules-and-automatic-discovery/

tests

Added some unit tests

references

• Partially addresses Exclude directory without defining all directories in atlantis.yaml #859
• Closes feat: Add ability to ignore path to autodiscover #5254

[lukemassa]

@chenrui333 you had approved #5254, @nitrocode and I prefer this alternative, any concerns?

[nitrocode]

No concerns from me. I also prefer this alternative.