catch EDR instance queries in Starlette

[tomkralidis]

Overview

This PR handles Starlette greedy routing for EDR instance queries.

Related Issue / discussion

Additional information

None

Dependency policy (RFC2)

• I have ensured that this PR meets RFC2 requirements

Updates to public demo

• I have ensured that breaking changes to the pygeoapi master demo server have been addressed
  • https://github.com/geopython/demo.pygeoapi.io/blob/master/services/pygeoapi_master/local.config.yml

Contributions and licensing

(as per https://github.com/geopython/pygeoapi/blob/master/CONTRIBUTING.md#contributions-and-licensing)

• I'd like to contribute [feature X|bugfix Y|docs|something else] to pygeoapi. I confirm that my contributions to pygeoapi will be compatible with the pygeoapi license guidelines at the time of contribution
• I have already previously agreed to the pygeoapi Contributions and Licensing Guidelines

[webb-ben]

Does this function make use of collection_id, instance_id, location_id? or are they provided as expected inputs that L523-532 resolves from the request parameters?

[webb-ben]

Moreover, what is the circumstance in which instance_id is derived from this PR instead of the subsequent lines that parse the Route params for instance_id

    if 'instance_id' in request.path_params:
        instance_id = request.path_params['instance_id']

[tomkralidis]

Moreover, what is the circumstance in which instance_id is derived from this PR instead of the subsequent lines that parse the Route params for instance_id

    if 'instance_id' in request.path_params:
        instance_id = request.path_params['instance_id']

instance_id is utilizied in the above when the route is /collections/{collection_id}/instances/{instance_id}.

When the route is /collections/{collection_id}/instances/{instance_id}/position (or other instance_id based query types), instance_id is not picked up, which is what this PR fixes for the EDR query type routing.

[webb-ben]

Ahh:
path returns the rest of the path, including any additional / characters.