xen-bugtool/make_inventory(): Py3: Update tuple lambda to for loop

[bernhardkaindl]

Update a map() in make_inventory() to also work with Python3 (using a for loop - more readable and concise):

The syntax for tuple parameters in lambda functions has been removed in Python3 and must be replaced:

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This code iterates over the inventory dictionary using the items() method and unpacks each key-value pair into k and v. Then, it calls the inventory_entry() function with the appropriate arguments.

In general, map() is useful when you want to apply a function to every item of an iterable and return a list of the results.

However, if you only need to iterate over the items of an iterable and perform some operation on each item, a for loop is often more readable and concise than using map().

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Established for Python3 migration with a recent Python3 merge for xsconsole:

Replacing such map() loops with a for loop has already been established with the recently merged equivalent Python3 commit for xsconsole.

CI Tests of this code:

The functionality of this code is already tested by each of the test cases in tests/integration/ as all of them validate the contents and XML schema of bugtool-output/inventory.xml