✨ Index mounting ordering & few debug nits

[mjudeikis]

Summary

This PR does few things:

1. Fixes usage of HOME workspace where it does not honour host fixes: bug: kubectl-ws '~' changes hostname used in kubeconfig server URL #3011
2. A few debug logs for cache and CRD creation (way too many hours spend on those...)
3. Add weight into index routes:

// 1. We detect URL for the request and find the correct handler. URL can be
// shard based, virtual workspace or mount. First two are covered by r.URL,
// where mounts are covered by annotation on the workspace with the mount path.
// 2. If mountpoint is found, we rewrite the URL to resolve, else use one in
// request to match with mappings.
// 3. Iterate over mappings and find the one that matches the URL. If found,
// use the handler for that mapping, else use default handler - kcp.
// Mappings are done from most specific to least specific:
// Example: /clusters/cluster1/ will be matched before /clusters/

In general, it dynamically overrides mounts URLs (this was not done before), and matches them in order of length. Higher the weight (weight = length of the path) first it will get matches.

Without this, map is randomly selected and if you have 2 mappings with

clusters/foo
clusters/

your traffic will be randomized :)

Related issue(s)

Fixes #

Release Notes

Orders index path from longest with weight. 

[sttts]

/lgtm
/approve

[kcp-ci-bot]

LGTM label has been added.

Git tree hash: 2e78003c68c0581c6433186cbccf51d0aebf1af8

[kcp-ci-bot]

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