Fix for backup option dest key for network modules

[james-powis]

SUMMARY

Fixes #57131

'dest' lives as a function level variable as defined at https://github.com/ansible/ansible/blob/devel/lib/ansible/plugins/action/network.py#L76

and in the nested dictionary in 3 different places under 2 different situations:

Under normal running (and with --diff):

if 'dest' in copy_result:
    result['backup_path'] = copy_result['dest']

When running with --check

if 'invocation' in copy_result and 'dest' in copy_result['invocation']:
    result['backup_path'] = copy_result['invocation']['dest']

And always:

result['backup_path'] = copy_result['invocation']['module_args']['dest']

This change cleans up the code a little, while using the function level variable we already had set.

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

action plugin, network.py

[ansibot]

cc @NilashishC @Qalthos @danielmellado @ganeshrn @justjais @trishnaguha
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[ganeshrn]

Thank you!