Add podLabels to the ambassador-agent deployment

[GalM128]

Description

Adding the option to add pod labels to the ambassador agent deployment since current version only support selector labels.

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Documentation

• I updated the relevant .md documentation.
• I updated the relevant website documentation.
• This PR does not require documentation updates.

Dependencies

• This PR contains new dependencies
• This PR does not have any change in dependencies.

Testing

• I provided sufficient test coverage for the modified code.
• The existing tests capture the requirements for the modified code.
• The bulk of my code covered by unit tests.
• I executed manual tests to validate my changes and to avoid regressions.