[action] [PR:17096] [Mellanox] Revert LPM implementation to the old way #17366
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Why I did it
The current low power mode setting implementation requests the user to set the port to admin down first before toggling LP mode, this is not backward compatible, now revert it to the old way so that the user can toggle the LP mode regardless of the port admin status.
Work item tracking
How I did it
Revert the recent changes related to LPM in PR #14130 and #16545
How to verify it
run all sfputil and SFP platform API related tests on all the Mellanox platforms.
Which release branch to backport (provide reason below if selected)
Tested branch (Please provide the tested image version)
Description for the changelog
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)