Do not allow setters in IndexLoadingConfig

[Jackie-Jiang]

IndexLoadingConfig should always be initialized by TableConfig and Schema, and all the index related config should be extracted from them. Right now we allow setters to internal fields such as _invertedIndexColumns, noDictionaryColumns etc which makes config management extremely hard, especially after introducing Index SPI. We have run into problems such as forward index config not picked up from table config.

We use this issue to track all effort of removing setters from IndexLoadingConfig.

Similarly, we should also remove all setters in SegmentGeneratorConfig

[Jackie-Jiang]

Do not allow setting TableConfig in IndexLoadingConfig after construction: #14098

[deepthi912]

I can look into this.