Fixes #1171

This allows the user to manually choose the name of the underlying
Pulumi Docker image resource

When not defined it will fall back to the original behavior (use the
image tag as the name of the underlying resource)

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Co-authored-by: Anton Tayanovskyy <anton@pulumi.com>

This test has been creating P1s and blocking PR verification; we are
waiting on a feature fix from platform to enable increasing custom
timeout. IN the meanwhile skipping it is reasonable.

Fixes #1262 by updating code
generator dependency from pulumi/pulumi to the latest version.

Provider upgrade tests are updated to the latest version of
https://github.com/pulumi/providertest with skips cross-referencing
issues.

The acceptance test job started failing with out-of-disk-space; to
compensate for the moment a disk cleanup step is added to free more disk
space on the runner.

Propagate disk space workaround from PRs to all other workflows.

The DotNet tests require the path to the directory containing the awsx
nuget package to be set using `PULUMI_LOCAL_NUGET`. This adds
functionality for automatically setting this env variable with the path
to the dotnet sdk

Also added a convenience make target to install all SDKs

Fixes recent failure of AWS Classic lint on master. Latest dependencies
of pulumi/pulumi no longer work with 16.

#1268