Add alpha commands for MCP connector

[turkenh]

Description of your changes

This PR adds the following two (alpha) commands to connect to an MCP from an application cluster:

• up alpha ctp connect cp --token $API_TOKEN: Creates a K8s secret with MCP Kubeconfig and installs MCP connector into the kube-system namespace (by default)
• up alpha ctp bind storage.starter.org/v1alpha1: Creates APIService for a given API version/group aggregating them from the connected MCP.

I have:

• [x] Read and followed Upbound's contribution process.
• [x] Run make reviewable to ensure this PR is ready for review.
• [ ] Added backport release-x.y labels to auto-backport this PR, as appropriate.

How has this code been tested

Tested against my MCP in production as a result of FRE.

❯ up alpha ctp list
NAME   ID                                     STATUS
cp     5b2e4d3e-58bf-4747-b91a-0337e8049aba   ready

❯ up alpha ctp connect cp --token $API_TOKEN
Connected to the MCP "cp", ready for binding APIs!

❯ up alpha ctp bind database.starter.org/v1alpha1
APIs under database.starter.org/v1alpha1 were bound to the Managed Control Plane!

❯ kubectl api-resources |grep starter
postgresqlinstances                            database.starter.org/v1alpha1          true         PostgreSQLInstance

[turkenh]

@turkenh a few nitpicks that are mostly non-blocking, but I think we need to fix the hard-coded kubeconfig path prior to merge 👍🏻

Fixed it and responded to others.