Add DevCenter dataplane service package

[chrissmiller]

Packages impacted by this PR

@azure-rest/developer-devcenter

Issues associated with this PR

Azure/azure-sdk#4702

Describe the problem that is addressed by this PR

There is not an existing package for the Azure DevCenter service

What are the possible designs available to address the problem? If there are more than one possible design, why was the one in this PR chosen?

N/A

Are there test cases added in this PR? (If not, why?)

Yes

Provide a list of related PRs (if any)

N/A

Command used to generate this PR:**(Applicable only to SDK release request PRs)

N/A

Checklists

• Added impacted package name to the issue description
• Does this PR needs any fixes in the SDK Generator?** _(If so, create an Issue in the Autorest/typescript repository and link it here)_No, but linked issue for the test recorder: @azure/test-recorder breaks polling final status with original-uri #23420.
• [] Added a changelog (if necessary) N/A, initial commit