[PATCH][RFC] Various memory enhancements for MVT tiles

[taylor.smock]

JOSM start arugment: --download=39.0637818,-108.5670233,39.0660809,-108.5620022
Plugins: Mapillary (shift+, to download MVT tiles)

Memory allocations over 50s for r18430, limited to threads with protobuf related methods:

• Run 1: 8,979,920,352 bytes
• Run 2: 8,773,894,032 bytes

Memory allocations over 50s for r18431, limited to threads with protobuf related methods

• Run 1: 7,653,697,192 bytes
• Run 2: 7,133,589,400 bytes
• Run 3: 7,532,364,336 bytes

I'll go ahead and merge this patch on Monday, absent objections.

Memory allocations over 50s for r18431 + patch, limited to threads with protobuf related methods:

• Run 1: 823,974,256 bytes
• Run 2: 850,025,712 bytes
• Run 3: 756,248,936 bytes

Most of the performance enhancements come from:

1. Avoiding various ArrayList#grow calls
   • A lot is from passing around a `ByteArrayOutputStream
2. Caching bboxes in VectorNodes (I'm kind of ambivalent on this -- I don't want to keep the bboxes around, but a significant number of allocations came from QuadBuckets#search, of which a significant number of allocations came from VectorNode#getBBox, ~1,400,000,000 bytes, or ~20%)
3. Caching nodes in a Map<ILatLon, VectorNode> map to avoid calling QuadBuckets#search when possible

The patch additionally fixes a bug with VectorRelation#setMembers and adds a default method putAll for Tagged.

[taylor.smock]

MVT performance improvements

[taylor.smock]

Flamegraph (green == removed allocations, red == added allocations)

[taylor.smock]

r18465 removed the need to cache bboxes in VectorNodes.

[taylor.smock]

In 18473/josm:

Fix #22032: Various memory enhancements for MVT tiles

There is about a 88% decrease in memory allocations due to MVT tiles.

The majority of changes came from the following:

1. Avoiding ArrayList#grow calls by using a ByteArrayOutputStream that gets passed around
2. Caching nodes to avoid QuadBuckets#search calls

This additionally fixes a bug where VectorRelation#setMembers does not
work properly and adds a putAll method in Tagged (there is a default
method).

[taylor.smock]

In 18477/josm:

Fix tests broken in r18473, see #22032

This was caused by vector tiles not always having points,
then ways, then polygons. The code now ensures that we
add points first, followed by ways, and finally by polygons.