feat: Updated video/live-stream Python Samples to add features and more information from the API

[chrishampart]

Description

Made two fixes and added several features to the Live Stream API Python samples as follows:

Fixed video/live-stream/create_channel.py so that it correctly reads from the --input_id argument.
Added a feature to video/live-stream/create_input.py so that --input_type can be optionally used as an argument to set the input-type on the input being created.
Added features to video/live-stream/get_channel.py so that additional fields returned by the API are displayed in the output.
Added features to video/live-stream/get_input.py so that additional fields returned by the API are displayed in the output.
Added features to video/live-stream/list_channels.py so that additional fields returned by the API are displayed in the output.
Fixed video/live-stream/update_channel.py so that it correctly reads from the --input_id argument.
Added feature to video/live-stream/update_channel.py so that --log_config can optionally by used as an argument to set the log_severity / log level for the channel.

Checklist

• I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• README is updated to include all relevant information
• Tests pass: nox -s py-3.9 (see Test Environment Setup)
• Lint pass: nox -s lint (see Test Environment Setup)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[gemini-code-assist]

Summary of Changes

Hello @chrishampart, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the Python samples for the Live Stream API by addressing argument handling inconsistencies and substantially enriching the output of 'get' and 'list' operations. It also introduces new capabilities for creating inputs with specified types and updating channel logging configurations, making the samples more robust and informative for users interacting with the API.

Highlights

• Input ID Fixes: Corrected create_channel.py and update_channel.py to properly utilize the --input_id argument for input attachments, resolving previous hardcoded values.
• Configurable Input Type: Enhanced create_input.py to allow specifying the input type (e.g., RTMP_PUSH, SRT_PUSH) via an optional --input_type command-line argument.
• Expanded Channel Information: Significantly augmented get_channel.py and list_channels.py to display a broader range of details returned by the Live Stream API, including creation/update times, streaming state, errors, input attachments, output URIs, log configurations, and stream definitions.
• Detailed Input Information: Improved get_input.py to output more comprehensive information about an input, such as its type, tier, and URI.
• Configurable Channel Logging: Added an optional --log_config argument to update_channel.py, enabling users to set the log severity level for a channel.

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[gemini-code-assist]

Code Review

This pull request introduces several features and fixes to the Live Stream API Python samples. It correctly handles input_id arguments, adds options for input_type and log_config, and expands the information displayed by the get and list samples. The changes are a significant improvement. I've identified one likely bug where a variable is used as a string literal and one minor maintainability issue related to variable naming. Addressing these will further improve the quality of the samples.