Update tiles to the approved specification

[francbartoli]

Description

Related to #699

• The TileJSON should also be changed to be an alternate representation of a particular tileset, as opposed to a described by / separate metadata resource
• Also the tileMatrixSetURI should use the TMS register , e.g. http://www.opengis.net/def/tilematrixset/OGC/1.0/WebMercatorQuad
• The tileMatrixSet key is for a full TMS description, the id should use id

Steps to Reproduce

See also this diagram with the approved spec

Steps to reproduce the behavior:

Open the tiles about the lake collection in the demo instance

Expected behavior
The closest implementation might be found here

Screenshots/Tracebacks
If applicable, add screenshots to help explain your problem.

Environment

OS:
Python version:
pygeoapi version:
Additional context
Add any other context about the problem here.

[PascalLike]

../collections/{colllectionId}/tiles/{tileMatrixSetId}/metadata seems no longer part of the specification.
It seems that metadata should be moved to ../collections/{colllectionId}/tiles/{tileMatrixSetId}?f=json

It's expected to contain TileSetMetadata
Schema here

pygeoapi old metadata endpoint ✔️
pygeoapi current metadata endpoint ❗
Example from specs
Example from another implementation

@doublebyte1 @francbartoli

[doublebyte1]

@PascalLike @francbartoli please take a look at this #987

[github-actions]

As per RFC4, this Issue has been inactive for 90 days. In order to manage maintenance burden, it will be automatically closed in 7 days.

[doublebyte1]

@francbartoli @PascalLike I guess this is solved now.