Dazl

Add a `dazl tail` subcommand which shows a live log of the transaction stream as changes happen.

python: Add support for type interning in DAML-LF 1.11. This is necessary for full compatibility with Daml Connect 1.10.

python: Deprecate some little-used symbols in preparation for the dazl v8 API.

python:
* Minor bug fixes.
* Bump up the `grpcio` 1.32.0 version minimum requirement.

Add support for DAML-LF 1.11 archives (as introduced in DAML SDK 1.9).

Expose a new Network configuration, enable_http_proxy that allows for configuring whether or not the underlying gRPC library uses HTTP proxies (specifically, this flag: https://grpc.github.io/grpc/core/group__grpc__arg__keys.html#gaa3f69f6e1e789e36d2d9c6083fec0257)

To use it:

py
network = Network()
network.set_config(url='...', enable_http_proxy=False)