doc: Update links in docs

[allenlsy]

Description:

Update links to source code files in the OSM Components & Interactions and Design
documents.

Diagram link:

• View only: https://drive.google.com/file/d/102PcUyFgm36l75e0ILxyeKq9Uu35OIGP/view?usp=sharing
• Edit: https://app.diagrams.net/#G102PcUyFgm36l75e0ILxyeKq9Uu35OIGP

Resolves #4226

Testing done:

There is no code change.

Affected area:

Functional Area
New Functionality	[ ]
CI System	[ ]
CLI Tool	[ ]
Certificate Management	[ ]
Control Plane	[ ]
Demo	[ ]
Documentation	[X]
Egress	[ ]
Ingress	[ ]
Install	[ ]
Networking	[ ]
Observability	[ ]
Performance	[ ]
SMI Policy	[ ]
Security	[ ]
Sidecar Injection	[ ]
Tests	[ ]
Upgrade	[ ]
Other	[ ]

Please answer the following questions with yes/no.

1. Does this change contain code from or inspired by another project?
   • Did you notify the maintainers and provide attribution?

No

2. Is this a breaking change?

No

3. Has documentation corresponding to this change been updated in the osm-docs repo (if applicable)?

No

[snehachhabria]

This doesn't resolve the issue; the diagram isn't a true representation of OSM anymore and needs to be updated. That's the requirement of the issue

[snehachhabria]

• The diagram is still incorrect; injector isn't a part of osm-controller anymore. osm-bootstrap is missing.
• Integration to Vault and cert manager is missing
• Prometheus and grafana doesn't pull metrics from application pods only, it pulls metrics from the control plane as well

These are just a few of the inconsistencies, please refer the code to get an idea of the architecture. this will help improve the diagram

[allenlsy]

@snehachhabria Diagram updated per feedback. PTAL.

[snehachhabria]

A few suggestions on the diagram:

• Tresor is missing as one of the cert managers
• we can indicate that the mesh config is created from osm-bootstrap
• osm-injector creates the sidecar on the k8s pod, this needs to be indicated

[shashankram]

The image updates look good @allenlsy. If you used Google doc to create the image, would you mind sharing a link to the google doc hosting the image just in case we need to update it in the future? Was discussing with @trstringer about how to keep the images up to date, and we felt it would be best to use Google doc/slides to create images so we can easily edit them in the future.