reports_available_components default value is not true

[chenlujjj]

Component(s)

extension/opamp

Describe the issue you're reporting

check the code:
the default value for ReportsAvailableComponents bool is not set to true, which is declares in the read me doc. This may lead to user confusion.

[github-actions]

Pinging code owners:

• extension/opamp: @portertech @evan-bradley @tigrannajaryan

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[bacherfl]

Thank you for reporting, @chenlujjj - If the code owners agree that this should in fact be set to true by default, I have created a PR that should fix that