Add Azure Synapse Analytics endpoint

[idear1203]

add AzureSynapseServiceEndpointSuffix and AzureSynapseServiceEndpointResourceId for Azure Synapse Analytics

[isra-fel]

LGTM

[isra-fel]

Hi, here's the suggestion on the following things:

1. Build signed package: https://dev.azure.com/azure-sdk/internal/_build?definitionId=700
2. Put signed package in azure-powershell/tools/LocalFeed
3. Edit .\tools\Common.Netcore.Dependencies.targets , change the version to all common libs to the version of signed package
4. Develop azure powershell on top of local package, and when it's ready, submit a PR
5. When the PR is ready to merge, we'll build and publish a new version of common libs. Update your references and delete local packages.
6. We merge the PR

[idear1203]

Hi, here's the suggestion on the following things:

1. Build signed package: https://dev.azure.com/azure-sdk/internal/_build?definitionId=700
2. Put signed package in azure-powershell/tools/LocalFeed
3. Edit .\tools\Common.Netcore.Dependencies.targets , change the version to all common libs to the version of signed package
4. Develop azure powershell on top of local package, and when it's ready, submit a PR
5. When the PR is ready to merge, we'll build and publish a new version of common libs. Update your references and delete local packages.
6. We merge the PR

Thanks for the detailed steps! I will follow the instructions.