[cmd/opampsupervisor]: Add support for specifying Fulcio root certificates

[BinaryFissionGames]

Component(s)

cmd/opampsupervisor

Describe the issue you're reporting

The SIGSTORE_ROOT_FILE environment variable can be used to specify a path to these certificates, otherwise they are grabbed from the internet. However, we should make these configurable in our config, since that's where all other supervisor configuration exists.

This is relies on collector executable updates being merged in #35503

[github-actions]

Pinging code owners:

• cmd/opampsupervisor: @evan-bradley @atoulme @tigrannajaryan @BinaryFissionGames

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[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• cmd/opampsupervisor: @evan-bradley @atoulme @tigrannajaryan

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[dpaasman00]

Can this get assigned to me? Thanks!