Unify dependencies in agent image

[eapolinario]

Why are the changes needed?

We're installing potentially incompatible grpcio dependencies in the flyetagent image.

What changes were proposed in this pull request?

Installs all dependencies in a single invocation of uv pip install in the flyetagent image. We also add a test at publish-time to confirm that agents can start.

How was this patch tested?

Local builds.

Setup process

Screenshots

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

Docs link

[eapolinario]

I confirmed that the command works here. We get this error if we try to start the flyteagent image:

docker run --rm ghcr.io/flyteorg/flyteagent:1.14.0 pyflyte serve agent --port 8000 --timeout 1
...
│ /usr/local/lib/python3.10/site-packages/grpc_health/v1/health_pb2_grpc.py:19 │
│ in <module>                                                                  │
│                                                                              │
│    16 │   _version_not_supported = True                                      │
│    17                                                                        │
│    18 if _version_not_supported:                                             │
│ ❱  19 │   raise RuntimeError(                                                │
│    20 │   │   f'The grpc package installed is at version {GRPC_VERSION},'    │
│    21 │   │   + f' but the generated code in grpc_health/v1/health_pb2_grpc. │
│    22 │   │   + f' grpcio>={GRPC_GENERATED_VERSION}.'                        │
╰──────────────────────────────────────────────────────────────────────────────╯
RuntimeError: The grpc package installed is at version 1.67.1, but the generated
code in grpc_health/v1/health_pb2_grpc.py depends on grpcio>=1.68.1. Please 
upgrade your grpc module to grpcio>=1.68.1 or downgrade your generated code 
using grpcio-tools<=1.67.1.
...

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.95%. Comparing base (f99d50e) to head (747b82a).
Report is 6 commits behind head on master.

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HEAD has 1 upload less than BASE

Flag	BASE (f99d50e)	HEAD (747b82a)
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Additional details and impacted files

@@             Coverage Diff             @@
##           master    #3008       +/-   ##
===========================================
- Coverage   51.08%   35.95%   -15.13%     
===========================================
  Files         201      201               
  Lines       21231    21168       -63     
  Branches     2731     2728        -3     
===========================================
- Hits        10846     7612     -3234     
- Misses       9787    13448     +3661     
+ Partials      598      108      -490     

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