[Mellanox] Update SAI to v1.19.4

[volodymyrsamotiy]

Signed-off-by: Volodymyr Samotiy [email protected]

Why I did it

Advance to new Nvidia SAI release with the following changes:

New features:

- Align with new SDK/FW version 4.5.1006 and above and in parallel to existing used SDK/FW bundle
- Implement timestamp and egress_queue_index hostif packet attributes.

Bugs fixes:

- Fix compilation issues with gcc10
- Fix return code for buffer overflow for query enum values and query statistics capabilities
- Reduce verbosity of print in case packet ingress on invalid port
- Fix mirror Qos settings

How I did it

Updated SAI version and submodule pointer

How to verify it

Run regression tests from sonic-mgmt

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

• 201811
• 201911
• 202006
• 202012
• 202106

Description for the changelog

[Mellanox] Update SAI to v1.19.4

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

[volodymyrsamotiy]

/azpw run

[mssonicbld]

/AzurePipelines run

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