[Dendrite] Polylith ingress and config fixes

[Jonnobrow]

Description of the change

Add an ingress configuration with correct routing for each polylith service.

Benefits

Reduces the toil in getting a polylith setup ready to go.

Possible drawbacks

Config fixes may be breaking, although unlikely to be honest.

Applicable issues

• closes #1600

Additional information

Checklist

• [x] Title of the PR starts with chart name (e.g. [home-assistant])
• [x] Chart version bumped in Chart.yaml according to semver.
• [x] Chart artifacthub.io/changes changelog annotation has been updated in Chart.yaml. See Artifact Hub documentation for more info.
• [x] Variables have been documented in the values.yaml file.

[genofire]

Wow, nice work @Jonnobrow :heart: - thank you for this :kissing:

Could i ask for setting the .well-known/matrix/{server,client}