Example of such class declaration would be `10 < class A` expression
The expression is uncompilable, but parsable. Unfortunately, the
FIR compiler does not save `class A` reference in it (because it
is not an expression, and only an expression can be a LHS or RHS of
binary expression `10 < ...`)
When we try to build light classes, we will try to find/build FIR
declaration for this class, but we won't be able to, and this will throw
an error
Adding this check should fix few
`FirKotlinHighlightingPassTestGenerated$Regression` tests
Roman Golyshev
7b1052296e