[clang-repl] Disable InterpreterExceptionTest on RISC-V (#68216)

This test fails as .eh_frame handling is not yet implemented for RISC-V
in JITLink. #66067 is proposed to address this.

Skip the test until the issue is resolved. It seems that D159167 enabled
this test for more than just ppc64. As the test always failed, it just
wasn't run until now, I think skipping is the correct interim approach
(as is already done for Arm, Darwin, and others).