feat: add options to enable identify and identify push

[wemeetagain]

Without rate limiting, identify push may be a DoS vector.

In the mean while it is useful to configure libp2p to completely disable identify and identify push if desired.

FYI was not able to test this test due to type errors installing the latest dependencies :(

[mpetrunic]

Other than that comment, LGTM

[achingbrain]

The general pattern is enabled: true (defaults to true) rather than disableIdentify: true (defaults to false) (see circuit relay, hop, nat, etc config).

The types seem ok in CI but the tests are failing.

I think adding an enabled: true flag is ok as a tactical fix but longer term maybe we want to split the default protocols (identify, identify-push, ping, fetch) out into modules and have them added as part of config, same as transports or peer discovery modules, etc. What do you think?

[wemeetagain]

and have them added as part of config, same as transports or peer discovery modules, etc.

Absolutely. the way it works now is a too 'magic'.

[mpetrunic]

Triage: No longer important enough.

[p-shahi]

relates to #1469