Calva structural editing fails if cljfmt parsing fails

[PEZ]

If the parsing of cljfmt config fails, an error is thrown which prevents structural edits which perform formatting from completing. Resulting in a quite broken Calva.

The issue got a bit worse when we made Calva automatically read cljfmt config files even with non-configured calva.fmt.configPath:

• Default value for calva.fmt.configPath? #2243
• If calva.fmt.configPath not set, look in default config locations #2246