STACIT: STAC 1.1 support

[m-mohr]

What does this PR do?

Implement support for STAC 1.1 in STACIT driver.

Is waiting for #10721

Disclaimer: Last time I wrote C/C++ was 10 years ago, this may take me a while...

What are related issues/pull requests?

None

Tasklist

• [ ] Add support for STAC 1.1 in STACIT
• [ ] ~Add support for STAC 1.1 in STACTA~
• [ ] Add support for STAC 1.1 in CLI (gdalinfo)?
• [ ] Check common band names for validity
• [ ] Make sure code is correctly formatted (cf pre-commit configuration)
• [ ] Add test case(s)
• [ ] Add documentation
• [ ] Updated Python API documentation (swig/include/python/docs/)
• [ ] Review
• [ ] Adjust for comments
• [ ] All CI builds and checks have passed