Add linter checks to GHA & Fix code to pass lints

Add linter checks to GHA & Fix code to pass lints.
The linters added are:
- whitespace: Tool for detection of leading and trailing whitespace
- gosec: Inspects source code for security problems
- gci: Gci control golang package import order and make it always deterministic
- misspell: Finds commonly misspelled English words in comments
- gomnd: An analyzer to detect magic numbers

The file utils/utils.go is excluded from the checks of gomnd, as uses magic numbers through the code

db/statedb/statedb_test.go

@@ -32,7 +32,6 @@ func newAccount(t *testing.T, i int) *common.Account {
 		PublicKey: pk,
 		EthAddr:   address,
 	}
-
 }
 
 func TestStateDBWithoutMT(t *testing.T) {