feat: add debug-mode around all network requests

[Integralist]

There was a bug recently which we were only able to identify and fix, by dumping a related HTTP request/response.

We have --debug-mode but currently it only passes that information to go-fastly which dumps the req/resp.

This PR adds the same logic as found in go-fastly and ensures all network requests are wrapped in conditional branches checking for debug mode being enabled.

[kailan]

This is so helpful – thank you!

[Integralist]

NOTE: The tests that are failing in CI aren't fail locally 🤷🏻‍♂️

Nothing has changed with those files so not sure why they're failing now.

@jsocol if you have any ideas, then let me know. I'll try and find some time to dig into why later.

I checked the file that is checked by the test suite and nothing looks out of place:

cli/pkg/commands/compute/testdata/metadata/config.toml

Lines 1 to 4 in 9f3452b

	[wasm-metadata]
	build_info = "disable"
	machine_info = "disable"
	package_info = "disable"

[jsocol]

We also got a failure in pkg/config/TestUseStatic reading config-legacy.toml which hasn't been touched in 2 years. Some kind of change to the MacOS runners recently?

[kpfleming]

This was the tomlq change; I'll update this branch and the tests should pass.

[kpfleming]

Tests are now passing, I'll merge this.