[vm/bytecode] Fix vm/cc/TryCatchOptimizer unit tests These tests look for local variables by names in LocalScope. However, in bytecode we keep information about local variables only for debugging and LocalScope objects are not created. This change adds implementation of local variables lookup using bytecode debugging information. In PRODUCT mode (which doesn't have debugging information) these tests are disabled. Change-Id: Ia5eafb440fa19bc1007582a360c36a87aa637e6f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/113271 Reviewed-by: Régis Crelier <regis@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com>
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