fix(rome_js_analyze): fix ts const assertion on noUndeclaredVariables

[xunilrj]

Summary

Fix a problem with noUndeclaredVariables regarding Typescript const assertion.

Test Plan

> cargo test -p rome_js_analyze -- no_undeclared_variables

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[github-actions]

Parser conformance results on ubuntu-latest

js/262

Test result	main count	This PR count	Difference
Total	45879	45879	0
Passed	44936	44936	0
Failed	943	943	0
Panics	0	0	0
Coverage	97.94%	97.94%	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	1684	1684	0
Failed	4262	4262	0
Panics	0	0	0
Coverage	28.32%	28.32%	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	12397	12397	0
Failed	3860	3860	0
Panics	0	0	0
Coverage	76.26%	76.26%	0.00%

[leops]

While this works well enough as a simple fix, we may want to revise how as const is represented in the AST by introducing a specialized TsConstType node for this keyword instead of using an identifier (this would align with other "special" types like TsVoidType, TsUndefinedType, TsNeverType or TsThisType)