Replace SQLite schema table rebuild by ALTER functions when supported

[Simon Charette]

Per ​https://www.sqlite.org/lang_altertable.html

• ALTER TABLE RENAME COLUMN is ​supported since 3.25 but had issues with unique columns until 3.27
• ALTER TABLE ADD COLUMN is ​supported since 3.2.0 not sure why it wasn't used in the first place since 3.2 was released in 2005? (added in 2f73e5406d54cb8945e187eff302a3a3373350be)
• ALTER TABLE DROP COLUMN ​will be supported by 3.35

This will leave only ALTER COLUMN and ADD/REMOVE CONSTRAINT that must be emulated on SQLite 3.35+

[Mariusz Felisiak]

Thanks Simon!

Marking as "Someday/Maybe" because it can we fully implemented after 3.35.0 release (such as #32501).

[Mariusz Felisiak]

​https://sqlite.org/releaselog/3_35_0.html

[GitHub <noreply@…>]

In 4e249d1:

Refs #32502 -- Added SchemaEditor.prepare_default() on SQLite.

[Mariusz Felisiak]

​PR

[Mariusz Felisiak <felisiak.mariusz@…>]

In 2f73e540:

Refs #32502 -- Avoided table rebuild when adding fields with no default on SQLite.