Changes to Create git configuration

added the new github_app enum value to the authMethod response property for the response status 201

added the new optional request property commitSigningCommitterEmail

added the new optional request property commitSigningCommitterName

added the new optional request property deployKeyPassphrase

added the new optional request property deployPrivateKey

added the new optional request property githubAppInstallationId

added the new github_app enum value to the request property authMethod

added the required property commitSigningCommitterEmail to the response with the 201 status

added the required property commitSigningCommitterName to the response with the 201 status

added the required property commitSigningPublicKey to the response with the 201 status

added the required property githubAppInstallationId to the response with the 201 status