Update slack.py by Adding Function (#268)

[peterdudfield]

• Update slack.py

Add counrty flag to slack no action requireed

• Update Slack failure callback in consume-runvnl-dag

Replaces the static Slack failure callback with a dynamic callback using get_slack_message_callback_no_action_required('in') for improved configurability.

• Remove unused slack_message_callback_no_action_required import

Cleaned up the imports in consume-runvnl-dag.py by removing the unused slack_message_callback_no_action_required import. This helps maintain code clarity and avoids unnecessary imports.

• Update slack.py

removing unnecessary lines

• Refactor Slack callback message formatting

Improved the formatting of the Slack notification message in get_slack_message_callback_no_action_required for better readability. Also standardized string quotes in consume-runvnl-dag.py and removed unnecessary whitespace.

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Pull Request

Description

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• Yes

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Checklist:

• My code follows OCF's coding style guidelines
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• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked my code and corrected any misspellings