chore(examples): cleanup old examples

[dreamorosi]

Description of your changes

This PR aims at removing unused and obsolete examples that were initially created in the very early stages of the project and that later went unmaintained. Now that the repo has two examples in CDK and SAM under the examples folder, the ones that were under of the packages/logger and packages/metrics folders can be removed.

The diff for this PR is big as each example had its own file. Aside from the files removed the changes include:

• Edits in all the README files to remove links to these folders
• Edit in the main page of the documentation where these folders were mentioned
• Edits in the pacakges/[logger|metrics]/package.json files to remove the npm scripts to run these examples
• Minor edit in one of the unit test files that was referencing an interface defined in these examples

When merged this issue will close #332

How to verify this change

See existing unit tests pass successfully on GitHub actions.

Related issues, RFCs

#332

PR status

Is this ready for review?: YES
Is it a breaking change?: NO

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have made corresponding changes to the examples
• My changes generate no new warnings
• The code coverage hasn't decreased
• New and existing unit tests pass locally and in Github Actions
• The PR title follows the conventional commit semantics

Breaking change checklist

N/A

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[ijemmy]

Not sure if the change on Lambda interface is intentional.

Apart from that, I'm good with this change.

[ijemmy]

Why do we add this interface?

[dreamorosi]

It's needed for the decorator unit test cases, Tracer has one like this as well.

Before this PR it used to be in a separate file inside the now deleted folder. I have added it to this file instead of living a folder with one single file of 3 lines.