refactor(wakunode2): extract setup proc definitions from main section

[LNSD]

Another gardening PR 🌳 Preparing the ground for improving the configuration management.

• Move wakunode2 setup procs out of isMainModule section
• Add try/catch clauses to the exception-raising procs and return a result
• Turn setup methods using waitFor into {.async.}.

NOTE: As a rule of thumb, waitFor should be used in the outermost scope (in this case, main(), in the tests the asyncTest already performs the waitFor for us.

[status-im-auto]

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❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	3a1276c	#1	2022-10-20 18:49:05	~16 min	linux	📦bin
✔️	3a1276c	#1	2022-10-20 18:50:57	~18 min	macos	📦bin

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	71b065e	#2	2022-10-21 11:02:34	~17 min	linux	📦bin
✔️	71b065e	#2	2022-10-21 11:04:55	~20 min	macos	📦bin
✔️	e2cbe79	#3	2022-10-21 11:06:07	~15 min	linux	📦bin
✔️	e2cbe79	#3	2022-10-21 11:09:53	~19 min	macos	📦bin

[alrevuelta]

lgtm! the main module now is way easier to read!