west_commands: runners: Fix parameters passed to xsdb

[mubinsyed]

Existing logic is passing elf file as parameter only when fsbl or bit file parameter is present. This is incorrect, elf file should be always passed irrespective of other parameters.

[github-actions]

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[pdgendt]

@kedareswararao PTAL

[pdgendt]

@mubinsyed the tests will need to be adjusted too.

[mubinsyed]

@mubinsyed the tests will need to be adjusted too.

sure, I will update tests

[github-actions]

Hi @mubinsyed!
Congratulations on getting your very first Zephyr pull request merged 🎉🥳. This is a fantastic achievement, and we're thrilled to have you as part of our community!

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Thank you for your valuable input, and we look forward to seeing more of your contributions in the future! 🪁