Support sub-techniques for newer API versions

[Konverto-MartinGasser]

With commit 3f4ed3c MITRE sub-techniques should be supported and do not require to be removed anymore.

[f-bader]

I guess this is only true if the api version is current enough. See #37
My solution would be to validate that the selected api version is above this threshold and only then allow subtechniques

[f-bader]

Double checked the documentation and it's not as easy as to just keep them. There needs to be the container with, and a container without the subrechniques.

Minimum API version is indeed 2023-12-01-preview

"tactics": [
    "Reconnaissance"
],
"techniques": [
    "T1589",
    "T1592",
    "T1598"
],
"subTechniques": [
    "T1589.001",
    "T1592.001"
]

@Konverto-MartinGasser do you feel up for the task adding this including tests or rather wait until I have the time to implement it?

[Konverto-MartinGasser]

I was able to implement the function and do some local testing/deploying, which was working as expected. Tomorrow I will try to create matching tests, but honestly, I don't think that I succeed. I'll let you know how it went.

[f-bader]

Very cool. If you need help with the tests let me know. Happy to help

[Konverto-MartinGasser]

Hey @f-bader, could you kindly take a look at my changes and especially on those tests I've written? I've never worked with test-files so far so I'm not sure I did the right thing ( at least they are not failing ;) )
I'm also not quite happy how I merge the properties relevantTechniques, subTechniques and techniques when converting from ARM to YAML. Maybe you have a suggestion on how to improve it?

Thanks

[f-bader]

Will do but most likely next week

[f-bader]

@Konverto-MartinGasser Amazing work and sorry it took me so long to validate and merge this.