monitor-component-metrics.md complete rewrite. (#3434)
monitor-component-metrics.md complete rewrite. (#3434)

* monitor-component-metrics.md complete rewrite.

Minor grammatical changes.

Typo fix, minor sentence changes

Fix: removed namespace since it will render the command useless

* Calico how-to guides structure implemented
TOC was removed from the page.
How to steps were completly reordered
minor changes in pod and useraccount yaml instructions to comply with Prometheus best practice.
Isolated everything in a namespace

* Minor fixes

* Broken link!

* Update monitor-component-metrics.md

* Update monitor-component-metrics.md

* Update monitor-component-metrics.md

Co-authored-by: Alex Pollitt <60c6d277a8bd81de7fdde19201bf9c58a3df08f4@tigera.io>
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