USB handler is spamming logs

[iinuwa]

USB state is spamming logs on every poll for available devices. We should reduce that to TRACE level logs at least, and probably suppress identical logs, as it will rarely be useful to see that many logs even while developing.

[msirringhaus]

This needs to be fix in libwebauthn

[iinuwa]

closed by linux-credentials/libwebauthn#308 and #228