fix(cli): large context causes E2BIG error during synthesis on Linux

[otaviomacedo]

Linux systems don't support environment variables larger than 128KiB. This change splits the context into two if it's larger than that and stores the overflow into a temporary file. The application then re-constructs the original context from these two sources.

A special case is when this new version of the CLI is used to synthesize an application that depends on an old version of the framework. The application will still consume part of the context, but the CLI warns the user that some of it has been lost.

Since the tree manipulation logic is basically the same as the one used for displaying notices, it was extracted into its own file.

Re-roll #21230 Fixes #19261

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license Instead of passing the context in an environment variable, the CLI now writes the context to a temporary file and sets an environment variable only with the location. The app then uses that location to read from the file.

Also tested manually on a Linux machine.

Re-roll #21230 Fixes #19261

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