Allow PTP message transmission intervals outside the range of the Default PTP Profile (ISPCS2022 tests)

Some PTP Profiles (e.g telecom) differ with respect to the Default PTP Profile (supported by WR switch) only by the configuration of transmission interval of PTP messages. Technically, WR Switch could be configured to support such profiles. However, the current implementation limits artificially the PTP message transmission intervals to the ranges allowed by the Default PTP Profile.

The limitation is (as far as I can tell) in two places

dot-config generation on WR Switch (when using wrs_manuconfig)
PPSi (by defines)

It is proposed to allow wide range of transmission intervals. This could be done by

extending the current "Overwrite default PTP device attributes" in "PTP Options" menu
allowing to define custom PTP Profile
other way.

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