make validator report mismatches of lane directions on a highway

[aceman]

In addition to ticket #8519, these tag mismatches could be reported by the validator:

• if the highway is oneway=yes, report an error on any occurence of "*:backward" tags. Open issue -> what to do on oneway=-1 ? What is the interpretation of lane directions in that case?
• if the highway is oneway=yes, report a warning on any tags "*:forward" or "*:backward". Hint that the version of the tag without specifying direction can be used.
• if only one of "lanes:forward" or "lanes:backward" is specified on a highway that is not oneway, report a warning to add the opposite tag.

[Klumbumbus]

In 8077/josm:

fix #9389 - add validator warning for :forward and :backward in oneways; add validator info for lanes:backward without lanes:forward and vice versa

[skyper]

Nice, thanks.

Think the lanes:backward/forward check should be a warning.

[Klumbumbus]

see #11977 for adjustment

[Klumbumbus]

In 10535/josm:

fix #13156, see #9389 - allow oneway=yes bicycle:forward=use_sidepath combination