fix(xtask): enforce a stable ordering for the generated imports of lint rules

[leops]

Summary

The cargo codegen analyzer command automatically generates imports for all the files in the analyzers and assists directories, but the ordering of the imports in the generated files depends on the order they are returned by the underlying filesystem. This order isn't stable and may change depending on the operating system, which leads to unnecessary merge conflicts for pull requests that add lint rules as the auto-generated files get modified every time the codegen script is run. This PR fixes the issue by modifying the script to sort the lint rules by their name in the resulting generated code.

[github-actions]

Parser conformance results on ubuntu-latest

js/262

Test result	main count	This PR count	Difference
Total	45878	45878	0
Passed	44938	44938	0
Failed	940	940	0
Panics	0	0	0
Coverage	97.95%	97.95%	0.00%

jsx/babel

Test result	main count	This PR count	Difference
Total	39	39	0
Passed	36	36	0
Failed	3	3	0
Panics	0	0	0
Coverage	92.31%	92.31%	0.00%

symbols/microsoft

Test result	main count	This PR count	Difference
Total	5946	5946	0
Passed	350	350	0
Failed	5596	5596	0
Panics	0	0	0
Coverage	5.89%	5.89%	0.00%

ts/babel

Test result	main count	This PR count	Difference
Total	588	588	0
Passed	519	519	0
Failed	69	69	0
Panics	0	0	0
Coverage	88.27%	88.27%	0.00%

ts/microsoft

Test result	main count	This PR count	Difference
Total	16257	16257	0
Passed	12391	12391	0
Failed	3866	3866	0
Panics	0	0	0
Coverage	76.22%	76.22%	0.00%

[github-actions]

Playground for commit 0c78400