Code fragment is a class that extends from Any, so technically it can
have fake overrides for equals/hashCode/toString. However, K1 does not
build them, and it's already checked in IR text tests in
`analysis/analysis-api/testData/components/compilerFacility/compilation/codeFragments`,
so don't build them in K2 as well. Also, the code in
`KtFirCompilerFacility.createJvmIrCodegenFactory` looks for a single
function defined in the code fragment.
Alexander Udalov
ebc2a18da5