[202012] [Mellanox] Read transceiver EEPROM via sdk sysfs

[keboliu]

This PR depends on #12531

Why I did it

1. ethtool is not able to read certain pages(eg. page 11h) of CMIS cables.
2. SDK provides a set of sysfs to expose the transceiver EEPROM, now we migrate from using ethtool to read these sysfs for transceiver EEPROM reading.

How I did it

1. replace ethtool with accessing the SDK sysfs for cable EEPROM reading.
2. Adjust the offset according to the SDK sysfs memory map.

How to verify it

run sonic-mgmt sfp-related regression test case.

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[lgtm-com]

This pull request introduces 1 alert and fixes 6 when merging e7f964b into 479e6ea - view on LGTM.com

new alerts:

• 1 for Unused import

fixed alerts:

• 5 for Unused local variable
• 1 for Unreachable code

[lgtm-com]

This pull request fixes 6 alerts when merging b02794b into bb2d098 - view on LGTM.com

fixed alerts:

• 5 for Unused local variable
• 1 for Unreachable code

[lgtm-com]

This pull request fixes 6 alerts when merging 0d1a06c into 8e7a491 - view on LGTM.com

fixed alerts:

• 5 for Unused local variable
• 1 for Unreachable code

[lgtm-com]

This pull request fixes 6 alerts when merging 76f859f into 8e7a491 - view on LGTM.com

fixed alerts:

• 5 for Unused local variable
• 1 for Unreachable code

[keboliu]

Pending for new SDK upstream, please hold the merge first

[liat-grozovik]

Note: converted to draft as it is pending new SDK PR to be upstream first.