Transceiever-5: Added deviation for operational-mode leaf

[hattikals]

Added deviation for operational-mode leaf and refactored the code to handle the same.

[OpenConfigBot]

Pull Request Functional Test Report for #3334 / bc4e78256b1d15f453c41aa6f6d221dfb841d85f

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.
Cisco 8000E		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.
Cisco XRd		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.
Juniper ncPTX		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.
Nokia SR Linux		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.
Openconfig Lemming		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.
Cisco 8808		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.
Juniper PTX10008		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.
Nokia 7250 IXR-10e		TRANSCEIVER-5: Configuration: 400ZR channel frequency, output TX launch power and operational mode setting.

Help

[coveralls]

Pull Request Test Coverage Report for Build 11567864865

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 55.268%

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Totals
Change from base Build 11559676696:	0.0%
Covered Lines:	1983
Relevant Lines:	3588

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💛 - Coveralls

[ahsaanyousaf]

Can you please take a look and resolve the conflicts. Thanks

[hattikals]

@ahsaanyousaf Resolved the conflicts.