[TSD] Added annotations for DISABLE_COURSE_CREATION feature flag

[arslanashraf7]

Related ticket:

mitodl#244

Description

Adds annotations for DISABLE_COURSE_CREATION feature flag.

Other information

There are a few points of explanation for this PR,

• Since this flag was never added into cms/envs/common.py and it was only used with a get call with default value as False, so for the sake of consistency I've added it to cms/envs/common.py.
• The value I've used for the toggle_creation_date is based on the earliest usage of this flag I could find in the codebase.
• The value(None) used for toggle_tickets is because there was no specific ticket that would add this flag specifically, there are multiple PR that just have the usage of this.

[openedx-webhooks]

Thanks for the pull request, @arslanashraf7! I've created OSPR-5661 to keep track of it in JIRA, where we prioritize reviews. Please note that it may take us up to several weeks or months to complete a review and merge your PR.

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[natabene]

@arslanashraf7 Thank you for your contribution. @eLRuLL @BbrSofiane Could you please review?

[arslanashraf7]

@pdpinch FYI.

[BbrSofiane]

@arslanashraf7 Can you be a bit more descriptive in the toggle_description? Does it remove the 'New Course' button on the studio side?

[arslanashraf7]

@BbrSofiane, You're correct it hides the "New Course" button the I missed to add this, I've updated the annotations & PR description.

Please have a look & let me know what you think of it now.

[BbrSofiane]

Nice @arslanashraf7! @edx/doc-a-thon-reviewers this is ready to be merged,

[natabene]

@felipemontoya @bradenmacdonald Please merge when you have a chance.

[pdpinch]

@arslanashraf7 can you update the commit message to follow the Conventional Commits guidelines? I think all you need is to put "docs: " at the beginning of the commit message.

[arslanashraf7]

@arslanashraf7 can you update the commit message to follow the Conventional Commits guidelines? I think all you need is to put "docs: " at the beginning of the commit message.

@pdpinch, Thanks for pointing it out. I've updated the commit message as per the conventional commit guidelines.

[edx-status-bot]

Your PR has finished running tests. There were no failures.

[openedx-webhooks]

@arslanashraf7 🎉 Your pull request was merged!

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[arslanashraf7]

@pdpinch, thanks for taking out the time to review and merge this PR.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the staging environment in preparation for a release to production.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the production environment.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the staging environment in preparation for a release to production.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the production environment.

[natabene]

@BbrSofiane @pdpinch Thank you both!

[natabene]

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