Test email serive get status

[AllyW]

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[github-actions]

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+* Adding new parameter `waituntil` to Email communication send mail.
+* Adding new command `get send status` to Email communication.

[github-actions]

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• short-summary: "Get status of an email previously sent."

Replace "an" with "a" to correct the grammar:

• Change to: "Get status of a previously sent email."

[github-actions]

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+    with self.command_group('communication email', is_preview=True) as g:
+        g.communication_custom_command('status get', 'communication_email_get_status', email_arguments)

Refinement:
Combine both command groups into a single with statement to avoid redundancy:

with self.command_group('communication email', client_factory=cf_communication_email, is_preview=True) as g:
    g.communication_custom_command('send', 'communication_email_send', email_arguments)
    g.communication_custom_command('status get', 'communication_email_get_status', email_arguments)

[github-actions]

🔎
PR Summary:

1. Added a new parameter waitUntil to the Email communication send mail command.
2. Introduced a new command get send status to obtain the status of previously sent emails.
3. Implemented a function to prepare attachments for email sending.
4. Updated the email send functionality to support operation ID and wait-until condition.
5. Added helper functions to parse connection strings and create signature headers.
6. Modified version from 1.9.3 to 1.10.0.