GitHub Issue ping duration should be user configurable.

[Hixie]

Currently the bot posts an update to each issue every few days. Since we have around a hundred issues open (primarily because of https://github.com/ossf/allstar/issues/108) this causes a huge amount of bugspam to anyone following the repository.

In pondering this I realised that technically the bot is violating our contribution guidelines, which say that a comment shouldn't be added if it doesn't add any new information. In general, if a bug is open, it is taken that it is still valid, and nothing need be said if nothing has changed.

[jeffmendoza]

Updated title. Config is here: https://github.com/ossf/allstar/blob/main/pkg/config/operator/operator.go#L63 This could be part of the org config https://github.com/ossf/allstar/blob/main/pkg/config/config.go#L31 and then each org can set their own setting.

[markdboyd]

I believe this was addressed by #206

[Hixie]

How do I configure it?

[jeffmendoza]

For #206, it is only configurable by app operators. We still need a user-configurable option, so leave this open for now.