MVT: deal better with HTTP 404 tile does not exist

[jpalmer]

When using the new MVT driver against a TileJSON endpoint that contains extents with many missing tiles I get lots of error print out with running ogrinfo. e.g:

ogrinfo MVT:"http://localhost:32769/data/parcels/4" -oo metadata_file="http://localhost:32769/data/parcels.json" nz_primary_parcels -so

ERROR 1: HTTP error code : 404 ERROR 1: Parsing error occured at line 2881

The service is return "TIle does not exist". I'm using Tileserver-gl for testing.

The service I'm testing is in NZ with data on both sides of the anti-meridian (bounds":[-180,-52.620881,180,-29.231342]), so that's why there are so many missing tiles. See full metadata for the layer I'm testing: ​https://www.dropbox.com/s/987fj5kv1z0gndv/parcels.json?dl=1

[Even Rouault]

In 41401:

MVT: improve handling of HTTP errors on missing tiles (fixes #7226)

[jpalmer]

Thank you so much Even!

Cheers Jeremy