Support multiple price estimates shown for shared modules

[hugorut]

In modules that are used by more than 1 project available in the VSCode workspace the Infracost extension chooses the first price to display over the top of any blocks in the shared module. However, these prices could differ significantly based on share module inputs, e.g. instance_type being supplied as a variable. We should alter the code lens output to signify to the user that more than one price can be displayed. Prices could be prefixed with the different names of the project calling the module.

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