feat(connectors): update the api

#### connectors:v1

The following keys were deleted:
- schemas.CustomConnectorVersion.properties.destinationConfig.$ref (Total Keys: 1)

The following keys were added:
- schemas.ConfigVariableTemplate.properties.locationType.type (Total Keys: 1)
- schemas.ConnectorVersion.properties.unsupportedConnectionTypes (Total Keys: 3)
- schemas.CustomConnectorVersion.properties.backendVariableTemplates (Total Keys: 2)
- schemas.CustomConnectorVersion.properties.destinationConfig (Total Keys: 2)

#### connectors:v2

The following keys were added:
- resources.projects.resources.locations.resources.connections.methods.checkReadiness (Total Keys: 11)
- resources.projects.resources.locations.resources.connections.methods.checkStatus (Total Keys: 11)
- resources.projects.resources.locations.resources.connections.methods.exchangeAuthCode (Total Keys: 12)
- resources.projects.resources.locations.resources.connections.methods.refreshAccessToken (Total Keys: 12)
- schemas.AccessCredentials (Total Keys: 6)
- schemas.CheckReadinessResponse (Total Keys: 3)
- schemas.CheckStatusResponse (Total Keys: 3)
- schemas.ExchangeAuthCodeRequest (Total Keys: 2)
- schemas.ExchangeAuthCodeResponse (Total Keys: 3)
- schemas.RefreshAccessTokenRequest (Total Keys: 2)
- schemas.RefreshAccessTokenResponse (Total Keys: 3)