Fix missing params in new draft

[crazytonyli]

Description

Fix two issues:

• Create a new draft with 'pending review' status. The status is lost after saving.
• Create a new draft with a future date. The future date is lost after saving.
• Updating post format did not work. This issue exists on the AbstractPost too.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Configuration	Release-Alpha
	Build Number	31654
	Version	PR #25416
	Bundle ID	org.wordpress.alpha
	Commit	ee5fff0
	Installation URL	4q1en4ukgoeog

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[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Configuration	Release-Alpha
	Build Number	31654
	Version	PR #25416
	Bundle ID	com.jetpack.alpha
	Commit	ee5fff0
	Installation URL	1r5j9jni2pl20

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[wpmobilebot]

Version 26.8 has now entered code-freeze, so the milestone of this PR has been updated to 26.9.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[kean]

It might be worth comparing with the current implementation. The main challenges I encountered were:

• Anything related to the scheduled posts
• Remove featured image