* Replace `RollingSessionWindow` with `RuntimeInfo` - initial commit

* Fix tests in import

* Fix the rest of the tests

* Remove dead code

* Fix todos

* Simplify session caching

* Comments for `SessionInfoProvider`

* Separate `SessionInfoProvider` from `State`

* `cache_session_info_for_head` becomes freestanding function

* Remove unneeded `mut` usage

* fn session_info -> fn get_session_info() to avoid name clashes. The function also tries to initialize `SessionInfoProvider`

* Fix SessionInfo retrieval

* Code cleanup

* Don't wrap `SessionInfoProvider` in an `Option`

* Remove `earliest_session()`

* Remove pre-caching -> wip

* Fix some tests and code cleanup

* Fix all tests

* Fixes in tests

* Fix comments, variable names and small style changes

* Fix a warning

* impl From<SessionWindowSize> for NonZeroUsize

* Fix logging for `get_session_info` - remove redundant logs and decrease log level to DEBUG

* Code review feedback

* Storage migration removing `COL_SESSION_WINDOW_DATA` from parachains db

* Remove `col_session_data` usages

* Storage migration clearing columns w/o removing them

* Remove session data column usages from `approval-voting` and `dispute-coordinator` tests

* Add some test cases from `RollingSessionWindow` to `dispute-coordinator` tests

* Fix formatting in initialized.rs

* Fix a corner case in `SessionInfo` caching for `dispute-coordinator`

* Remove `RollingSessionWindow` ;(

* Revert "Fix formatting in initialized.rs"

This reverts commit 0f94664ec9f3a7e3737a30291195990e1e7065fc.

* v2 to v3 migration drops `COL_DISPUTE_COORDINATOR_DATA` instead of clearing it

* Fix `NUM_COLUMNS` in `approval-voting`

* Use `columns::v3::NUM_COLUMNS` when opening db

* Update node/service/src/parachains_db/upgrade.rs

Co-authored-by: Andrei Sandu <[email protected]>

* Don't write in `COL_DISPUTE_COORDINATOR_DATA` for `test_rocksdb_migrate_2_to_3`

* Fix `NUM+COLUMNS` in approval_voting

* Fix formatting

* Fix columns usage

* Clarification comments about the different db versions

---------

Co-authored-by: Andrei Sandu <[email protected]>