Migrate to using faster monotonic_time_coarse from bluetooth-data-tools

[bdraco]

Proposed change

The bluetooth-data-tools implementation is ~44% faster than the current one

Bluetooth-Devices/bluetooth-data-tools#38

Type of change

• Dependency upgrade
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• This PR fixes or closes issue: fixes #
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[jbouwh]

Should we not update homeassistant.util.dt to use the faster variant, or is that a bad idea?

[bdraco]

Should we not update homeassistant.util.dt to use the faster variant, or is that a bad idea?

Its only used in bluetooth so I'm planning on deleting it in the next PR

[jbouwh]

LGTM,
Thnx @bdraco 👍

[bdraco]

Thanks