* Rename `global_hash` to `agg_tiles_hash`
This is still a big sticking point: what should be the name for the
metadata key for this value? The value represents the hash of all
`z,x,y,tile` over all rows of the `tiles` table (or view). Should it
include `md5` in its name, or should the hash be auto-detected by its
length? (details in #856)
* Generate it based on `tiles` table/view
* validate or generate, but not both (it will always fail otherwise)
* break up logic for per-tile, total, and integrity checks
* delete unused sqlx prep file
* Add `MbtType::FlatWithHash`
* Support copying, diffing and applying diffs to and from any
`MbtTypes`s
* Support validating tile data if hash is contained in `*.mbtiles` file
(i.e it is of `MbtType::FlatWithHash` or `MbtType::Normalized`)
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Co-authored-by: rstanciu <rstanciu@rivian.com>
Co-authored-by: Yuri Astrakhan <yuriastrakhan@gmail.com>
