Global variables V_ITCError/V_XOPError are present in databrowser

[t-b]

Slack: https://aiephys.slack.com/archives/C01CS4T8MGA/p1717794866962749?thread_ts=1717710611.362109&cid=C01CS4T8MGA

Either the ITC XOP creates those globally or we in MIES.

[t-b]

RegisterITCSetGlobals2 from the ITC XOP2 is at fault here. We probably need to have runtimeNumVarList = EXCEPTION_VARS; as well as otherwise SetOperationNumVar creates a global variable.