Track basic runtime information

[jezdez]

Implement a metric collector for basic information about the current conda environment and session, e.g. with information taken from the conda info subcommand process:

• Conda version
• Python version
• Solver version
• Version of plugin
• Conda-build version
• Virtual packages
• platform
• Configured channels (sanitized, no tokens)
• Local time in UTC

[travishathaway]

@jezdez,

I'm going to leave out the following because they are already present in the User-Agent header we send:

• Conda version
• Python version
• Solver version
• platform (via "os_distribution_name_version" and "platform_system_release)